diff --git a/MicronSync/Components/Forms/ChangeLog.Designer.cs b/MicronSync/Components/Forms/ChangeLog.Designer.cs
index 5b7f845..cb138c9 100644
--- a/MicronSync/Components/Forms/ChangeLog.Designer.cs
+++ b/MicronSync/Components/Forms/ChangeLog.Designer.cs
@@ -42,7 +42,7 @@
             this.richTextBox.Location = new System.Drawing.Point(13, 38);
             this.richTextBox.Name = "richTextBox";
             this.richTextBox.ReadOnly = true;
-            this.richTextBox.Size = new System.Drawing.Size(359, 361);
+            this.richTextBox.Size = new System.Drawing.Size(679, 360);
             this.richTextBox.TabIndex = 0;
             this.richTextBox.Text = "";
             // 
@@ -60,7 +60,7 @@
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.BackColor = System.Drawing.Color.White;
-            this.ClientSize = new System.Drawing.Size(384, 412);
+            this.ClientSize = new System.Drawing.Size(704, 411);
             this.Controls.Add(this.labelVersionInfo);
             this.Controls.Add(this.richTextBox);
             this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
diff --git a/MicronSync/Components/Forms/ChangeLog.txt b/MicronSync/Components/Forms/ChangeLog.txt
index 47ba559..c74c2a5 100644
--- a/MicronSync/Components/Forms/ChangeLog.txt
+++ b/MicronSync/Components/Forms/ChangeLog.txt
@@ -1,4 +1,18 @@
 [New Features]
+- Browse directly to any of the backup and restore paths with a conveniently placed shortcut.
+- Restore backups can now be triggered every time a restore operation is run.
+- Choose between dark and light themes which are persistent on the system..
+ 
+[Enhancements]
+- Ability to resize main window horizontally for easier legibility of long paths. Horizontal window size is
+also stored in a per config basis to accommodate different jobs.
+ 
+[MicronSync 1.2.5.1]-------------------------------------------------------------------------------
+[Enhancements]
+- MicronSync now notifies you when importing an invalid or bad configuration file.
+ 
+[MicronSync 1.2.5.0]-------------------------------------------------------------------------------
+[New Features]
 - The size of the source backup directory can now be calculated within MicronSync.
 - Backups created can have their size shown once calculated from the restore tab.
  
diff --git a/MicronSync/Components/Forms/WorkerUI.cs b/MicronSync/Components/Forms/WorkerUI.cs
index 0b7e7c3..d14d68e 100644
--- a/MicronSync/Components/Forms/WorkerUI.cs
+++ b/MicronSync/Components/Forms/WorkerUI.cs
@@ -2,6 +2,7 @@
 using System.ComponentModel;
 using System.Diagnostics;
 using System.IO;
+using System.Threading;
 using System.Windows.Forms;
 
 namespace MicronSync.Components
@@ -16,7 +17,7 @@ namespace MicronSync.Components
         }
         public LMZAParser.endResult _endResultLMZA = LMZAParser.endResult.Default;
         public CommonIO.endResult _endResultCIO = CommonIO.endResult.Default;
-        private readonly MSConfig _ManageConfig_RO = MainWindow._MSConfig;
+        private readonly MSConfig _MSConfig = MainWindow._MSConfig;
         private Stopwatch stopWatch = new Stopwatch();
         public TimeSpan compTime;
 
@@ -40,10 +41,10 @@ namespace MicronSync.Components
         private void LmzaBackup_DoWork(object sender, DoWorkEventArgs e)
         {
         _endResultLMZA = lmzaParser.MakePackage(
-            Path.GetFileName(_ManageConfig_RO.BackupDestination),
-            _ManageConfig_RO.BackupSource,
-            Path.GetDirectoryName(_ManageConfig_RO.BackupDestination),
-            _ManageConfig_RO.CompressionLevel,
+            Path.GetFileName(_MSConfig.BackupDestination),
+            _MSConfig.BackupSource,
+            Path.GetDirectoryName(_MSConfig.BackupDestination),
+            _MSConfig.CompressionLevel,
             "",
             false);
         }
@@ -59,26 +60,39 @@ namespace MicronSync.Components
             // Process params.
             using (CommonIO cio = new CommonIO())
             {
-                // Move source directory if also purging, otherwise perform standard copy.
-                if (_ManageConfig_RO.EnableBackup && !_ManageConfig_RO.EnablePurge)
-                    _endResultCIO = cio.CopyEntireDirectory(_ManageConfig_RO.RestoreDestination,
-                        _ManageConfig_RO.RestoreDestination + ".Backup");
-                else if (_ManageConfig_RO.EnableBackup && _ManageConfig_RO.EnablePurge)
+                var restoreBackupDir = _MSConfig.RestoreDestination + ".Backup";
+
+                // Clear out old backup directory if it exists.
+                if (_MSConfig.OverwriteBackup && Directory.Exists(restoreBackupDir))
                 {
-                    _endResultCIO = cio.RenameEntireDirectory(_ManageConfig_RO.RestoreDestination,
-                        _ManageConfig_RO.RestoreDestination + ".Backup");
-                    Directory.CreateDirectory(_ManageConfig_RO.RestoreDestination);
+                    Directory.Delete(restoreBackupDir, true);
+                    Thread.Sleep(500); // Delay needed for reliability!
                 }
 
-                if (_ManageConfig_RO.EnablePurge)
-                    _endResultCIO = cio.ClearEntireDirectory(_ManageConfig_RO.RestoreDestination);
+                // Move source directory if also purging, otherwise perform standard copy.
+                if (_MSConfig.EnableBackup && !_MSConfig.EnablePurge)
+                {
+                    _endResultCIO = cio.CopyEntireDirectory(
+                        _MSConfig.RestoreDestination,
+                        restoreBackupDir);
+                }
+                else if (_MSConfig.EnableBackup && _MSConfig.EnablePurge)
+                {
+                    _endResultCIO = cio.RenameEntireDirectory(
+                        _MSConfig.RestoreDestination,
+                        restoreBackupDir);
+                    Directory.CreateDirectory(_MSConfig.RestoreDestination);
+                }
+
+                if (_MSConfig.EnablePurge)
+                    _endResultCIO = cio.ClearEntireDirectory(_MSConfig.RestoreDestination);
             }
 
             if (_endResultCIO == CommonIO.endResult.Default)
                 _endResultLMZA = lmzaParser.ExtractPackage(
-                    Path.GetFileName(_ManageConfig_RO.RestoreSource),
-                    Path.GetDirectoryName(_ManageConfig_RO.RestoreSource),
-                    _ManageConfig_RO.RestoreDestination,
+                    Path.GetFileName(_MSConfig.RestoreSource),
+                    Path.GetDirectoryName(_MSConfig.RestoreSource),
+                    _MSConfig.RestoreDestination,
                     "");
         }
 
diff --git a/MicronSync/Components/Licencer.cs b/MicronSync/Components/Licencer.cs
index 7af0d94..962ee32 100644
--- a/MicronSync/Components/Licencer.cs
+++ b/MicronSync/Components/Licencer.cs
@@ -1,44 +1,35 @@
 using Microsoft.Win32;
 using System;
+using System.Net.NetworkInformation;
+using System.Text;
 
 namespace MicronSync.Components
 {
     public class Licencer
     {
         private readonly string privateKey = "TRZzjAutdtA542aeQj";
-        private readonly string msRegPath = @"SOFTWARE\MicronSync\";
-        private readonly string msRegKey = "Key";
+        private static SimplerAES aes = new SimplerAES(Encoding.ASCII.GetBytes(GetMachineGUID()));
         public static bool isRegistered { get; set; } = false;
 
         public bool CheckForExistingLicence()
         {
-            bool licenceExists = false;
+            bool isValidKey = false;
 
             try
             {
-                var regPath = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, RegistryView.Registry32);
-                var regKey = regPath?.OpenSubKey(msRegPath);
-                var value = regKey?.GetValue(msRegKey);
-
-                bool isValidKey = ValidateKey((string)value);
-
-                if (isValidKey)
-                {
-                    licenceExists = true;
-                }
-                else if (regKey != null && !isValidKey)
-                {
-                    MessageHandler.errorMessage(MessageHandler.errCodes.NewRegKeyUI_PirateKey, null);
-                    Environment.Exit(2);
-                }
-
+                isValidKey = ValidateKey(
+                    aes.Decrypt(Settings.Default.UserLicenseKey));
             }
-            catch (Exception)
+            catch (Exception) { isValidKey = false; }
+
+            if (isValidKey == false && Settings.Default.UserLicenseKey != string.Empty)
             {
-                licenceExists = false;
+                MessageHandler.errorMessage(MessageHandler.errCodes.NewRegKeyUI_PirateKey, null);
+                Settings.Default.UserLicenseKey = string.Empty;
+                Settings.Default.Save();
             }
 
-            return licenceExists;
+            return isValidKey;
         }
 
         public void ShowDonationPrompt()
@@ -47,6 +38,18 @@ namespace MicronSync.Components
             dui.ShowDialog();
         }
 
+        /// <summary>
+        /// Get Windows GUID.
+        /// </summary>
+        /// <returns></returns>
+        private static string GetMachineGUID()
+        {
+            var regPath = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Default);
+            var regKey = regPath?.OpenSubKey(@"SOFTWARE\Microsoft\Cryptography");
+
+            return regKey.GetValue("MachineGuid").ToString().Replace("-", string.Empty);
+        }
+
         /// <summary>
         /// Returns legitimacy of key.
         /// </summary>
@@ -62,21 +65,13 @@ namespace MicronSync.Components
         }
 
         /// <summary>
-        /// Stores key into user level registry.
+        /// Stores key into user level AppData.
         /// </summary>
         /// <param name="key"></param>
         public void SetKey(string key)
         {
-            try
-            {
-                var regPath = RegistryKey.OpenBaseKey(RegistryHive.CurrentUser, RegistryView.Registry32);
-                var regKey = regPath.CreateSubKey(msRegPath);
-                regKey.SetValue(msRegKey, key.ToUpper(), RegistryValueKind.String);
-            }
-            catch (Exception)
-            {
-                throw;
-            }
+            Settings.Default.UserLicenseKey = aes.Encrypt(key);
+            Settings.Default.Save();
         }
 
         /// <summary>
@@ -91,4 +86,4 @@ namespace MicronSync.Components
             return skgl.doKey(0, DateTime.Now);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/MicronSync/Components/MessageHandler.cs b/MicronSync/Components/MessageHandler.cs
index be61632..124eb16 100644
--- a/MicronSync/Components/MessageHandler.cs
+++ b/MicronSync/Components/MessageHandler.cs
@@ -35,6 +35,9 @@ namespace MicronSync
             MainWindow_BadConfigFile,
             MainWindow_BadConfigFile_FromEXE,
             MainWindow_DirectoryNotFound,
+            Config_BadFile,
+            MainWindow_BadExplorePath,
+            MainWindow_EmptyExplorePath,
         }
 
         /// <summary>
@@ -99,7 +102,7 @@ namespace MicronSync
                         MessageBoxButtons.OK, MessageBoxIcon.Error);
                     break;
                 case errCodes.NewRegKeyUI_PirateKey:
-                    MessageBox.Show($"You have imported a bad key onto your system. Please delete it to continue using this software.", "MicronSync",
+                    MessageBox.Show($"You have imported a bad key onto your system. It will now be deleted for the continued use of this software.", "MicronSync",
                         MessageBoxButtons.OK, MessageBoxIcon.Error);
                     break;
                 case errCodes.MainWindow_BadConfigFile:
@@ -110,6 +113,18 @@ namespace MicronSync
                     MessageBox.Show($"Unsupported data.\nOnly config files are supported when loaded directly from application!", "MicronSync",
                         MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                     break;
+                case errCodes.Config_BadFile:
+                    MessageBox.Show($"The following configuration file is corrupt or invalid:\n\n{info}", "MicronSync",
+                        MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+                    break;
+                case errCodes.MainWindow_BadExplorePath:
+                    MessageBox.Show($"The following path could not be found:\n\n{info}", "MicronSync",
+                        MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+                    break;
+                case errCodes.MainWindow_EmptyExplorePath:
+                    MessageBox.Show($"Cannot browse to an empty path.", "MicronSync",
+                        MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
+                    break;
             }
 
         }
@@ -147,7 +162,7 @@ namespace MicronSync
                         MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                     break;
                 case msgCodes.MainWindow_LoadIncompatible:
-                    _dialogResult = MessageBox.Show($"You are trying load a legacy config file (v{info}) which is incompatible with this version of MicronSync. Please create a new config file, sorry for any inconvenience caused!", "MicronSync - Incompatible config",
+                    _dialogResult = MessageBox.Show($"You are trying load a legacy config file (v{info}) which is incompatible with this version of MicronSync.\nPlease load a config file which is at least of version 1.2.0.0 or create a new one, sorry for any inconvenience caused!", "MicronSync - Incompatible config",
                         MessageBoxButtons.OK, MessageBoxIcon.Warning);
                     break;
                 case msgCodes.MainWindow_SZNotInstalled:
diff --git a/MicronSync/Components/SimplerAES.cs b/MicronSync/Components/SimplerAES.cs
new file mode 100644
index 0000000..bbc6f69
--- /dev/null
+++ b/MicronSync/Components/SimplerAES.cs
@@ -0,0 +1,53 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace MicronSync.Components
+{
+    public class SimplerAES
+    {
+        //private static byte[] key = { 123, 217, 19, 11, 24, 26, 85, 45, 114, 184, 27, 162, 37, 112, 222, 209, 241, 24, 175, 144, 173, 53, 196, 29, 24, 26, 17, 218, 131, 236, 53, 209 };
+        private static byte[] vector = { 124, 134, 176, 172, 17, 45, 121, 41, 250, 61, 14, 213, 50, 136, 255, 236 };
+        private ICryptoTransform encryptor, decryptor;
+        private UTF8Encoding encoder;
+
+        public SimplerAES(byte[] key)
+        {
+            RijndaelManaged rm = new RijndaelManaged();
+            encryptor = rm.CreateEncryptor(key, vector);
+            decryptor = rm.CreateDecryptor(key, vector);
+            encoder = new UTF8Encoding();
+        }
+
+        public string Encrypt(string unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(encoder.GetBytes(unencrypted)));
+        }
+
+        public string Decrypt(string encrypted)
+        {
+            return encoder.GetString(Decrypt(Convert.FromBase64String(encrypted)));
+        }
+
+        public byte[] Encrypt(byte[] buffer)
+        {
+            return Transform(buffer, encryptor);
+        }
+
+        public byte[] Decrypt(byte[] buffer)
+        {
+            return Transform(buffer, decryptor);
+        }
+
+        protected byte[] Transform(byte[] buffer, ICryptoTransform transform)
+        {
+            MemoryStream stream = new MemoryStream();
+            using (CryptoStream cs = new CryptoStream(stream, transform, CryptoStreamMode.Write))
+            {
+                cs.Write(buffer, 0, buffer.Length);
+            }
+            return stream.ToArray();
+        }
+    }
+}
diff --git a/MicronSync/Confused/bin/Release/MicronSync.exe b/MicronSync/Confused/bin/Release/MicronSync.exe
index 5604335..d1a01d1 100644
Binary files a/MicronSync/Confused/bin/Release/MicronSync.exe and b/MicronSync/Confused/bin/Release/MicronSync.exe differ
diff --git a/MicronSync/MainWindow.Designer.cs b/MicronSync/MainWindow.Designer.cs
index b5eb5a4..98c552d 100644
--- a/MicronSync/MainWindow.Designer.cs
+++ b/MicronSync/MainWindow.Designer.cs
@@ -31,6 +31,7 @@
             this.components = new System.ComponentModel.Container();
             System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainWindow));
             this.groupRestoreOptions = new System.Windows.Forms.GroupBox();
+            this.chkOverwriteBackup = new System.Windows.Forms.CheckBox();
             this.chkBackup = new System.Windows.Forms.CheckBox();
             this.chkPurge = new System.Windows.Forms.CheckBox();
             this.trackBar = new System.Windows.Forms.TrackBar();
@@ -51,6 +52,7 @@
             this.labelSourceSize = new System.Windows.Forms.Label();
             this.labelLastChange = new System.Windows.Forms.Label();
             this.panelBHighlight = new System.Windows.Forms.Panel();
+            this.btnExploreBSource = new System.Windows.Forms.Button();
             this.cmbRootBSrc = new System.Windows.Forms.ComboBox();
             this.btnRepBackupSource = new System.Windows.Forms.Button();
             this.labelBackupSource = new System.Windows.Forms.Label();
@@ -69,6 +71,7 @@
             this.labelBackupDest = new System.Windows.Forms.Label();
             this.textBackupDest = new System.Windows.Forms.TextBox();
             this.tabRestore = new System.Windows.Forms.TabPage();
+            this.btnExploreRDestination = new System.Windows.Forms.Button();
             this.cmbRootRDst = new System.Windows.Forms.ComboBox();
             this.panel2 = new System.Windows.Forms.Panel();
             this.btnCalcBackupSize = new System.Windows.Forms.Button();
@@ -98,8 +101,11 @@
             this.toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator();
             this.refreshDrivesToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.websiteToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.optionsToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.enableDarkThemeToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
+            this.toolStripSeparator3 = new System.Windows.Forms.ToolStripSeparator();
+            this.aboutToolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
             this.changelogToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
-            this.aboutToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.registerToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.enterDonationKeyToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.donateToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
@@ -120,6 +126,7 @@
             // 
             // groupRestoreOptions
             // 
+            this.groupRestoreOptions.Controls.Add(this.chkOverwriteBackup);
             this.groupRestoreOptions.Controls.Add(this.chkBackup);
             this.groupRestoreOptions.Controls.Add(this.chkPurge);
             this.groupRestoreOptions.Location = new System.Drawing.Point(10, 85);
@@ -129,6 +136,18 @@
             this.groupRestoreOptions.TabStop = false;
             this.groupRestoreOptions.Text = "Restore Options";
             // 
+            // chkOverwriteBackup
+            // 
+            this.chkOverwriteBackup.AutoSize = true;
+            this.chkOverwriteBackup.Enabled = false;
+            this.chkOverwriteBackup.Location = new System.Drawing.Point(9, 66);
+            this.chkOverwriteBackup.Name = "chkOverwriteBackup";
+            this.chkOverwriteBackup.Size = new System.Drawing.Size(159, 17);
+            this.chkOverwriteBackup.TabIndex = 23;
+            this.chkOverwriteBackup.Text = "Overwrite backup each time";
+            this.chkOverwriteBackup.UseVisualStyleBackColor = true;
+            this.chkOverwriteBackup.CheckedChanged += new System.EventHandler(this.chkOverwriteBackup_CheckedChanged);
+            // 
             // chkBackup
             // 
             this.chkBackup.AutoSize = true;
@@ -241,13 +260,16 @@
             // 
             // tabControl
             // 
+            this.tabControl.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
             this.tabControl.Controls.Add(this.tabBackup);
             this.tabControl.Controls.Add(this.tabRestore);
-            this.tabControl.Location = new System.Drawing.Point(12, 38);
+            this.tabControl.Location = new System.Drawing.Point(-4, 38);
             this.tabControl.Multiline = true;
             this.tabControl.Name = "tabControl";
             this.tabControl.SelectedIndex = 0;
-            this.tabControl.Size = new System.Drawing.Size(672, 214);
+            this.tabControl.Size = new System.Drawing.Size(692, 225);
             this.tabControl.TabIndex = 1;
             this.tabControl.SelectedIndexChanged += new System.EventHandler(this.tabControl_SelectedIndexChanged);
             // 
@@ -264,7 +286,7 @@
             this.tabBackup.Location = new System.Drawing.Point(4, 22);
             this.tabBackup.Name = "tabBackup";
             this.tabBackup.Padding = new System.Windows.Forms.Padding(3);
-            this.tabBackup.Size = new System.Drawing.Size(664, 188);
+            this.tabBackup.Size = new System.Drawing.Size(684, 199);
             this.tabBackup.TabIndex = 0;
             this.tabBackup.Text = "Backup";
             this.tabBackup.UseVisualStyleBackColor = true;
@@ -283,6 +305,7 @@
             // 
             // panel1
             // 
+            this.panel1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
             this.panel1.BackColor = System.Drawing.Color.MediumSeaGreen;
             this.panel1.Controls.Add(this.btnSourceSize);
             this.panel1.Controls.Add(this.labelSourceSizeValue);
@@ -290,9 +313,9 @@
             this.panel1.Controls.Add(this.labelLastChange);
             this.panel1.Controls.Add(this.labelSyncDate);
             this.panel1.Controls.Add(this.btnBackup);
-            this.panel1.Location = new System.Drawing.Point(528, 0);
+            this.panel1.Location = new System.Drawing.Point(548, 0);
             this.panel1.Name = "panel1";
-            this.panel1.Size = new System.Drawing.Size(136, 188);
+            this.panel1.Size = new System.Drawing.Size(136, 203);
             this.panel1.TabIndex = 33;
             // 
             // btnSourceSize
@@ -341,7 +364,10 @@
             // 
             // panelBHighlight
             // 
+            this.panelBHighlight.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
             this.panelBHighlight.BackColor = System.Drawing.Color.SeaGreen;
+            this.panelBHighlight.Controls.Add(this.btnExploreBSource);
             this.panelBHighlight.Controls.Add(this.cmbRootBSrc);
             this.panelBHighlight.Controls.Add(this.btnRepBackupSource);
             this.panelBHighlight.Controls.Add(this.labelBackupSource);
@@ -349,9 +375,20 @@
             this.panelBHighlight.Controls.Add(this.textBackupSource);
             this.panelBHighlight.Location = new System.Drawing.Point(0, 0);
             this.panelBHighlight.Name = "panelBHighlight";
-            this.panelBHighlight.Size = new System.Drawing.Size(533, 41);
+            this.panelBHighlight.Size = new System.Drawing.Size(553, 41);
             this.panelBHighlight.TabIndex = 32;
             // 
+            // btnExploreBSource
+            // 
+            this.btnExploreBSource.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnExploreBSource.Location = new System.Drawing.Point(451, 10);
+            this.btnExploreBSource.Name = "btnExploreBSource";
+            this.btnExploreBSource.Size = new System.Drawing.Size(29, 20);
+            this.btnExploreBSource.TabIndex = 34;
+            this.btnExploreBSource.Text = "↑";
+            this.btnExploreBSource.UseVisualStyleBackColor = true;
+            this.btnExploreBSource.Click += new System.EventHandler(this.btnExploreBSource_Click);
+            // 
             // cmbRootBSrc
             // 
             this.cmbRootBSrc.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
@@ -366,7 +403,8 @@
             // 
             // btnRepBackupSource
             // 
-            this.btnRepBackupSource.Location = new System.Drawing.Point(498, 10);
+            this.btnRepBackupSource.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnRepBackupSource.Location = new System.Drawing.Point(518, 10);
             this.btnRepBackupSource.Name = "btnRepBackupSource";
             this.btnRepBackupSource.Size = new System.Drawing.Size(24, 20);
             this.btnRepBackupSource.TabIndex = 5;
@@ -388,7 +426,8 @@
             // 
             // btnBackupBrowseSource
             // 
-            this.btnBackupBrowseSource.Location = new System.Drawing.Point(459, 10);
+            this.btnBackupBrowseSource.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnBackupBrowseSource.Location = new System.Drawing.Point(479, 10);
             this.btnBackupBrowseSource.Name = "btnBackupBrowseSource";
             this.btnBackupBrowseSource.Size = new System.Drawing.Size(40, 20);
             this.btnBackupBrowseSource.TabIndex = 4;
@@ -398,15 +437,18 @@
             // 
             // textBackupSource
             // 
+            this.textBackupSource.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
             this.textBackupSource.Location = new System.Drawing.Point(218, 10);
             this.textBackupSource.Name = "textBackupSource";
-            this.textBackupSource.Size = new System.Drawing.Size(240, 20);
+            this.textBackupSource.Size = new System.Drawing.Size(232, 20);
             this.textBackupSource.TabIndex = 3;
             this.textBackupSource.TextChanged += new System.EventHandler(this.textBackupSource_TextChanged);
             // 
             // btnRepBackupDest
             // 
-            this.btnRepBackupDest.Location = new System.Drawing.Point(498, 51);
+            this.btnRepBackupDest.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnRepBackupDest.Location = new System.Drawing.Point(518, 51);
             this.btnRepBackupDest.Name = "btnRepBackupDest";
             this.btnRepBackupDest.Size = new System.Drawing.Size(24, 20);
             this.btnRepBackupDest.TabIndex = 9;
@@ -519,7 +561,8 @@
             // 
             // btnBackupBrowseDest
             // 
-            this.btnBackupBrowseDest.Location = new System.Drawing.Point(459, 51);
+            this.btnBackupBrowseDest.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnBackupBrowseDest.Location = new System.Drawing.Point(479, 51);
             this.btnBackupBrowseDest.Name = "btnBackupBrowseDest";
             this.btnBackupBrowseDest.Size = new System.Drawing.Size(40, 20);
             this.btnBackupBrowseDest.TabIndex = 8;
@@ -539,15 +582,18 @@
             // 
             // textBackupDest
             // 
+            this.textBackupDest.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
             this.textBackupDest.Location = new System.Drawing.Point(218, 51);
             this.textBackupDest.Name = "textBackupDest";
-            this.textBackupDest.Size = new System.Drawing.Size(240, 20);
+            this.textBackupDest.Size = new System.Drawing.Size(260, 20);
             this.textBackupDest.TabIndex = 7;
             this.textBackupDest.TextChanged += new System.EventHandler(this.textBackupDest_TextChanged);
             this.textBackupDest.Validating += new System.ComponentModel.CancelEventHandler(this.textBackupDest_Validating);
             // 
             // tabRestore
             // 
+            this.tabRestore.Controls.Add(this.btnExploreRDestination);
             this.tabRestore.Controls.Add(this.cmbRootRDst);
             this.tabRestore.Controls.Add(this.panel2);
             this.tabRestore.Controls.Add(this.btnRepRestoreDest);
@@ -560,11 +606,22 @@
             this.tabRestore.Location = new System.Drawing.Point(4, 22);
             this.tabRestore.Name = "tabRestore";
             this.tabRestore.Padding = new System.Windows.Forms.Padding(3);
-            this.tabRestore.Size = new System.Drawing.Size(664, 188);
+            this.tabRestore.Size = new System.Drawing.Size(684, 199);
             this.tabRestore.TabIndex = 1;
             this.tabRestore.Text = "Restore";
             this.tabRestore.UseVisualStyleBackColor = true;
             // 
+            // btnExploreRDestination
+            // 
+            this.btnExploreRDestination.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnExploreRDestination.Location = new System.Drawing.Point(451, 51);
+            this.btnExploreRDestination.Name = "btnExploreRDestination";
+            this.btnExploreRDestination.Size = new System.Drawing.Size(29, 20);
+            this.btnExploreRDestination.TabIndex = 37;
+            this.btnExploreRDestination.Text = "↑";
+            this.btnExploreRDestination.UseVisualStyleBackColor = true;
+            this.btnExploreRDestination.Click += new System.EventHandler(this.btnExploreRDestination_Click);
+            // 
             // cmbRootRDst
             // 
             this.cmbRootRDst.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
@@ -579,6 +636,7 @@
             // 
             // panel2
             // 
+            this.panel2.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
             this.panel2.BackColor = System.Drawing.Color.GreenYellow;
             this.panel2.Controls.Add(this.btnCalcBackupSize);
             this.panel2.Controls.Add(this.labelBackupSizeValue);
@@ -586,9 +644,9 @@
             this.panel2.Controls.Add(this.labelLastBackup);
             this.panel2.Controls.Add(this.labelBackupDate);
             this.panel2.Controls.Add(this.btnRestore);
-            this.panel2.Location = new System.Drawing.Point(528, 0);
+            this.panel2.Location = new System.Drawing.Point(548, 0);
             this.panel2.Name = "panel2";
-            this.panel2.Size = new System.Drawing.Size(136, 188);
+            this.panel2.Size = new System.Drawing.Size(136, 203);
             this.panel2.TabIndex = 35;
             // 
             // btnCalcBackupSize
@@ -634,7 +692,8 @@
             // 
             // btnRepRestoreDest
             // 
-            this.btnRepRestoreDest.Location = new System.Drawing.Point(498, 51);
+            this.btnRepRestoreDest.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnRepRestoreDest.Location = new System.Drawing.Point(518, 51);
             this.btnRepRestoreDest.Name = "btnRepRestoreDest";
             this.btnRepRestoreDest.Size = new System.Drawing.Size(24, 20);
             this.btnRepRestoreDest.TabIndex = 19;
@@ -655,7 +714,8 @@
             // 
             // btnRestoreBrowseDest
             // 
-            this.btnRestoreBrowseDest.Location = new System.Drawing.Point(459, 51);
+            this.btnRestoreBrowseDest.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnRestoreBrowseDest.Location = new System.Drawing.Point(479, 51);
             this.btnRestoreBrowseDest.Name = "btnRestoreBrowseDest";
             this.btnRestoreBrowseDest.Size = new System.Drawing.Size(40, 20);
             this.btnRestoreBrowseDest.TabIndex = 18;
@@ -675,15 +735,19 @@
             // 
             // textRestoreDest
             // 
+            this.textRestoreDest.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
             this.textRestoreDest.Location = new System.Drawing.Point(218, 51);
             this.textRestoreDest.Name = "textRestoreDest";
-            this.textRestoreDest.Size = new System.Drawing.Size(240, 20);
+            this.textRestoreDest.Size = new System.Drawing.Size(232, 20);
             this.textRestoreDest.TabIndex = 17;
             this.textRestoreDest.TextChanged += new System.EventHandler(this.textRestoreDest_TextChanged);
             this.textRestoreDest.Validating += new System.ComponentModel.CancelEventHandler(this.textRestoreDest_Validating);
             // 
             // panel3
             // 
+            this.panel3.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
             this.panel3.BackColor = System.Drawing.Color.YellowGreen;
             this.panel3.Controls.Add(this.btnRepRestoreSource);
             this.panel3.Controls.Add(this.cmbRootRSrc);
@@ -691,12 +755,13 @@
             this.panel3.Controls.Add(this.textRestoreSource);
             this.panel3.Location = new System.Drawing.Point(0, 0);
             this.panel3.Name = "panel3";
-            this.panel3.Size = new System.Drawing.Size(533, 41);
+            this.panel3.Size = new System.Drawing.Size(553, 41);
             this.panel3.TabIndex = 34;
             // 
             // btnRepRestoreSource
             // 
-            this.btnRepRestoreSource.Location = new System.Drawing.Point(498, 10);
+            this.btnRepRestoreSource.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.btnRepRestoreSource.Location = new System.Drawing.Point(518, 10);
             this.btnRepRestoreSource.Name = "btnRepRestoreSource";
             this.btnRepRestoreSource.Size = new System.Drawing.Size(24, 20);
             this.btnRepRestoreSource.TabIndex = 15;
@@ -718,8 +783,9 @@
             // 
             // btnRestoreBrowseSource
             // 
+            this.btnRestoreBrowseSource.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
             this.btnRestoreBrowseSource.BackColor = System.Drawing.Color.Transparent;
-            this.btnRestoreBrowseSource.Location = new System.Drawing.Point(459, 10);
+            this.btnRestoreBrowseSource.Location = new System.Drawing.Point(479, 10);
             this.btnRestoreBrowseSource.Name = "btnRestoreBrowseSource";
             this.btnRestoreBrowseSource.Size = new System.Drawing.Size(40, 20);
             this.btnRestoreBrowseSource.TabIndex = 14;
@@ -729,9 +795,11 @@
             // 
             // textRestoreSource
             // 
+            this.textRestoreSource.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
             this.textRestoreSource.Location = new System.Drawing.Point(218, 10);
             this.textRestoreSource.Name = "textRestoreSource";
-            this.textRestoreSource.Size = new System.Drawing.Size(240, 20);
+            this.textRestoreSource.Size = new System.Drawing.Size(260, 20);
             this.textRestoreSource.TabIndex = 13;
             this.textRestoreSource.TextChanged += new System.EventHandler(this.textRestoreSource_TextChanged);
             this.textRestoreSource.Validating += new System.ComponentModel.CancelEventHandler(this.textRestoreSource_Validating);
@@ -758,8 +826,8 @@
             // 
             this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
             this.fileToolStripMenuItem,
+            this.optionsToolStripMenuItem,
             this.changelogToolStripMenuItem,
-            this.aboutToolStripMenuItem,
             this.registerToolStripMenuItem});
             this.menuStrip1.Location = new System.Drawing.Point(0, 0);
             this.menuStrip1.Name = "menuStrip1";
@@ -840,6 +908,36 @@
             this.websiteToolStripMenuItem.Text = "Website...";
             this.websiteToolStripMenuItem.Click += new System.EventHandler(this.websiteToolStripMenuItem_Click);
             // 
+            // optionsToolStripMenuItem
+            // 
+            this.optionsToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
+            this.enableDarkThemeToolStripMenuItem,
+            this.toolStripSeparator3,
+            this.aboutToolStripMenuItem1});
+            this.optionsToolStripMenuItem.Name = "optionsToolStripMenuItem";
+            this.optionsToolStripMenuItem.Size = new System.Drawing.Size(61, 20);
+            this.optionsToolStripMenuItem.Text = "Options";
+            // 
+            // enableDarkThemeToolStripMenuItem
+            // 
+            this.enableDarkThemeToolStripMenuItem.CheckOnClick = true;
+            this.enableDarkThemeToolStripMenuItem.Name = "enableDarkThemeToolStripMenuItem";
+            this.enableDarkThemeToolStripMenuItem.Size = new System.Drawing.Size(176, 22);
+            this.enableDarkThemeToolStripMenuItem.Text = "Enable Dark Theme";
+            this.enableDarkThemeToolStripMenuItem.Click += new System.EventHandler(this.enableDarkThemeToolStripMenuItem_Click);
+            // 
+            // toolStripSeparator3
+            // 
+            this.toolStripSeparator3.Name = "toolStripSeparator3";
+            this.toolStripSeparator3.Size = new System.Drawing.Size(173, 6);
+            // 
+            // aboutToolStripMenuItem1
+            // 
+            this.aboutToolStripMenuItem1.Name = "aboutToolStripMenuItem1";
+            this.aboutToolStripMenuItem1.Size = new System.Drawing.Size(176, 22);
+            this.aboutToolStripMenuItem1.Text = "About";
+            this.aboutToolStripMenuItem1.Click += new System.EventHandler(this.aboutToolStripMenuItem_Click);
+            // 
             // changelogToolStripMenuItem
             // 
             this.changelogToolStripMenuItem.Name = "changelogToolStripMenuItem";
@@ -847,13 +945,6 @@
             this.changelogToolStripMenuItem.Text = "Change Log";
             this.changelogToolStripMenuItem.Click += new System.EventHandler(this.changelogToolStripMenuItem_Click);
             // 
-            // aboutToolStripMenuItem
-            // 
-            this.aboutToolStripMenuItem.Name = "aboutToolStripMenuItem";
-            this.aboutToolStripMenuItem.Size = new System.Drawing.Size(52, 20);
-            this.aboutToolStripMenuItem.Text = "About";
-            this.aboutToolStripMenuItem.Click += new System.EventHandler(this.aboutToolStripMenuItem_Click);
-            // 
             // registerToolStripMenuItem
             // 
             this.registerToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
@@ -879,13 +970,14 @@
             // 
             // labelDevBuild
             // 
+            this.labelDevBuild.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
             this.labelDevBuild.AutoSize = true;
             this.labelDevBuild.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
-            this.labelDevBuild.Location = new System.Drawing.Point(614, 6);
+            this.labelDevBuild.Location = new System.Drawing.Point(609, 6);
             this.labelDevBuild.Name = "labelDevBuild";
-            this.labelDevBuild.Size = new System.Drawing.Size(64, 13);
+            this.labelDevBuild.Size = new System.Drawing.Size(69, 13);
             this.labelDevBuild.TabIndex = 23;
-            this.labelDevBuild.Text = "Beta Build 2";
+            this.labelDevBuild.Text = "Alpha Build 2";
             // 
             // MainWindow
             // 
@@ -900,14 +992,16 @@
             this.Controls.Add(this.tabControl);
             this.Controls.Add(this.statusStrip);
             this.Controls.Add(this.menuStrip1);
-            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
             this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
             this.MainMenuStrip = this.menuStrip1;
             this.MaximizeBox = false;
+            this.MaximumSize = new System.Drawing.Size(5000, 325);
+            this.MinimumSize = new System.Drawing.Size(700, 325);
             this.Name = "MainWindow";
             this.Text = "MicronSync";
             this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.MainWindow_FormClosing);
             this.Load += new System.EventHandler(this.Form1_Load);
+            this.SizeChanged += new System.EventHandler(this.MainWindow_SizeChanged);
             this.DragDrop += new System.Windows.Forms.DragEventHandler(this.MainWindow_DragDrop);
             this.DragEnter += new System.Windows.Forms.DragEventHandler(this.MainWindow_DragEnter);
             this.groupRestoreOptions.ResumeLayout(false);
@@ -972,7 +1066,6 @@
         private System.Windows.Forms.Label labelNoCompression;
         private System.Windows.Forms.ToolTip toolTip;
         private System.Windows.Forms.MenuStrip menuStrip1;
-        private System.Windows.Forms.ToolStripMenuItem aboutToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem fileToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem newToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem openToolStripMenuItem;
@@ -1012,6 +1105,13 @@
         private System.Windows.Forms.Button btnSourceSize;
         private System.Windows.Forms.Label labelSourceSizeValue;
         private System.Windows.Forms.Label labelSourceSize;
+        private System.Windows.Forms.Button btnExploreBSource;
+        private System.Windows.Forms.Button btnExploreRDestination;
+        private System.Windows.Forms.ToolStripMenuItem optionsToolStripMenuItem;
+        private System.Windows.Forms.ToolStripMenuItem enableDarkThemeToolStripMenuItem;
+        private System.Windows.Forms.ToolStripSeparator toolStripSeparator3;
+        private System.Windows.Forms.ToolStripMenuItem aboutToolStripMenuItem1;
+        private System.Windows.Forms.CheckBox chkOverwriteBackup;
     }
 }
 
diff --git a/MicronSync/MainWindow.cs b/MicronSync/MainWindow.cs
index b7fefc5..86f4e89 100644
--- a/MicronSync/MainWindow.cs
+++ b/MicronSync/MainWindow.cs
@@ -32,6 +32,7 @@ namespace MicronSync
             ProcessLicence();
             PopulateRootLists();
             ProcessArgs(args);
+            UseDarkTheme(Settings.Default.UseDarkTheme);
             labelDevBuild.Visible = false; // Comment out before releasing.
         }
 
@@ -91,12 +92,15 @@ namespace MicronSync
             toolTip.SetToolTip(chkPurge, "This will COMPLETELY wipe clean the restore destination directory\n" +
                 "prior to restoring from the selected backup.");
             toolTip.SetToolTip(chkBackup, "Enabling this option will create a backup of the restoration directory\n" +
-                "with the extension \".Backup\".");
+                "with the extension \".Backup\". This backup will not be updated unless the overwrite option is enabled.");
             toolTip.SetToolTip(btnRepBackupSource, "Replicate path to restore destination.");
             toolTip.SetToolTip(btnRepBackupDest, "Replicate path to restore source.");
             toolTip.SetToolTip(btnRepRestoreSource, "Replicate path to backup destination.");
             toolTip.SetToolTip(btnRepRestoreDest, "Replicate path to backup source.");
             toolTip.SetToolTip(labelCompressionPreset, "Selecting a preset to use will automatically choose optimal compression settings.");
+            toolTip.SetToolTip(btnExploreBSource, "Browse to specified directory.");
+            toolTip.SetToolTip(btnExploreRDestination, "Browse to specified directory.");
+            toolTip.SetToolTip(chkOverwriteBackup, "Overwriting your backup will consistently create a previous backup prior to each restore task.");
         }
 
         private void PopulateRootLists()
@@ -201,9 +205,11 @@ namespace MicronSync
             trackBar.Value = _MSConfig.CompressionLevel;
             chkBackup.Checked = _MSConfig.EnableBackup;
             chkPurge.Checked = _MSConfig.EnablePurge;
+            chkOverwriteBackup.Checked = _MSConfig.OverwriteBackup;
             UpTabSelection = _MSConfig.InBackupMode;
             UpBackupSizeValue = "N/A";
             UpSourceSizeValue = "N/A";
+            Width = _MSConfig.WindowWidth;
         }
 
         /// <summary>
@@ -376,6 +382,97 @@ namespace MicronSync
             }
         }
 
+        /// <summary>
+        /// Show save changes dialog on exit.
+        /// </summary>
+        private void PromptSaveChanges()
+        {
+            // Reset value before proceeding.
+            hasCancelledExit = false;
+
+            // Only prompt if there are unsaved changes.
+            if (!_MSConfig.userModifiedConfig) return;
+            DialogResult result;
+            result = MessageHandler.stdMessage(MessageHandler.msgCodes.MainWindow_SaveChanges, _MSConfig.openFile);
+
+            // Save to currently open file or to new one if there isn't one loaded.
+            if (result == DialogResult.Yes)
+            {
+                if (!string.IsNullOrEmpty(_MSConfig.openFile))
+                { _MSConfig.Save(); }
+                else
+                {
+                    _MSConfig.openFile =
+                      _CommonIO.SaveFile(null, CommonIO.FileType.ini);
+                }
+
+                _MSConfig.Save();
+            }
+            else if (result == DialogResult.Cancel)
+                hasCancelledExit = true;
+        }
+
+        private void OpenWithExplorer(string path)
+        {
+            if (Directory.Exists(path))
+            {
+                ProcessStartInfo psi = new ProcessStartInfo("explorer.exe", path);
+                Process.Start(psi);
+            }
+            else if (path == string.Empty || path == null)
+            {
+                MessageHandler.errorMessage(MessageHandler.errCodes.MainWindow_EmptyExplorePath, null);
+            }
+            else
+            {
+                MessageHandler.errorMessage(MessageHandler.errCodes.MainWindow_BadExplorePath, path);
+            }
+        }
+
+        private void UseDarkTheme(bool darkTheme)
+        {
+            var darkColour = Color.FromArgb(64, 64, 64);
+            var lightColour = Color.White;
+            var darkText = Color.Black;
+
+            if (darkTheme)
+            {
+                enableDarkThemeToolStripMenuItem.CheckState = CheckState.Checked;
+                Settings.Default.UseDarkTheme = true;
+
+                // Backup Tab.
+                tabBackup.BackColor = darkColour;
+                labelBackupDest.ForeColor = lightColour;
+                groupBackupOptions.BackColor = darkColour;
+                groupBackupOptions.ForeColor = lightColour;
+                trackBar.BackColor = darkColour;
+
+                // Restore Tab.
+                tabRestore.BackColor = darkColour;
+                labelRestoreDest.ForeColor = lightColour;
+                groupRestoreOptions.BackColor = darkColour;
+                groupRestoreOptions.ForeColor = lightColour;
+            }
+            else
+            {
+                enableDarkThemeToolStripMenuItem.CheckState = CheckState.Unchecked;
+                Settings.Default.UseDarkTheme = false;
+
+                // Backup Tab.
+                tabBackup.BackColor = lightColour;
+                labelBackupDest.ForeColor = darkText;
+                groupBackupOptions.BackColor = lightColour;
+                groupBackupOptions.ForeColor = darkText;
+                trackBar.BackColor = lightColour;
+
+                // Restore Tab.
+                tabRestore.BackColor = lightColour;
+                labelRestoreDest.ForeColor = darkText;
+                groupRestoreOptions.BackColor = lightColour;
+                groupRestoreOptions.ForeColor = darkText;
+            }
+        }
+
         #endregion
 
         #region UI Functionality
@@ -586,36 +683,6 @@ namespace MicronSync
 
         #endregion
 
-        /// <summary>
-        /// Show save changes dialog on exit.
-        /// </summary>
-        private void PromptSaveChanges()
-        {
-            // Reset value before proceeding.
-            hasCancelledExit = false;
-
-            // Only prompt if there are unsaved changes.
-            if (!_MSConfig.userModifiedConfig) return;
-            DialogResult result;
-            result = MessageHandler.stdMessage(MessageHandler.msgCodes.MainWindow_SaveChanges, _MSConfig.openFile);
-
-            // Save to currently open file or to new one if there isn't one loaded.
-            if (result == DialogResult.Yes)
-            {
-                if (!string.IsNullOrEmpty(_MSConfig.openFile))
-                { _MSConfig.Save(); }
-                else
-                {
-                    _MSConfig.openFile =
-                      _CommonIO.SaveFile(null, CommonIO.FileType.ini);
-                }
-
-                _MSConfig.Save();
-            }
-            else if (result == DialogResult.Cancel)
-                hasCancelledExit = true;
-        }
-
         #region Form
 
         private void tabControl_SelectedIndexChanged(object sender, EventArgs e)
@@ -633,6 +700,7 @@ namespace MicronSync
 
         private void MainWindow_FormClosing(object sender, FormClosingEventArgs e)
         {
+            Settings.Default.Save();
             PromptSaveChanges();
 
             if (!hasCancelledExit)
@@ -756,6 +824,11 @@ namespace MicronSync
         private void checkBackup_CheckedChanged(object sender, EventArgs e)
         {
             _MSConfig.EnableBackup = chkBackup.Checked;
+
+            if (chkBackup.CheckState == CheckState.Checked)
+                chkOverwriteBackup.Enabled = true;
+            else
+                chkOverwriteBackup.Enabled = false;
         }
 
         private void trackBar_ValueChanged(object sender, EventArgs e)
@@ -859,6 +932,34 @@ namespace MicronSync
                 UpSourceSizeValue = "N/A";
         }
 
+        private void btnExploreBSource_Click(object sender, EventArgs e)
+        {
+            OpenWithExplorer(_MSConfig.BackupSource);
+        }
+
+        private void btnExploreRDestination_Click(object sender, EventArgs e)
+        {
+            OpenWithExplorer(_MSConfig.RestoreDestination);
+        }
+
+        private void chkOverwriteBackup_CheckedChanged(object sender, EventArgs e)
+        {
+            _MSConfig.OverwriteBackup = chkOverwriteBackup.Checked;
+        }
+
+        private void MainWindow_SizeChanged(object sender, EventArgs e)
+        {
+            _MSConfig.WindowWidth = Width;
+        }
+
+        private void enableDarkThemeToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            if (enableDarkThemeToolStripMenuItem.CheckState == CheckState.Checked)
+                UseDarkTheme(true);
+            else
+                UseDarkTheme(false);
+        }
+
         #region Drag and drop
 
         private void MainWindow_DragEnter(object sender, DragEventArgs e)
diff --git a/MicronSync/ManageCfg.cs b/MicronSync/ManageCfg.cs
index 4f14eea..68ab038 100644
--- a/MicronSync/ManageCfg.cs
+++ b/MicronSync/ManageCfg.cs
@@ -1,10 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
-using System.Diagnostics;
 using System.IO;
 using System.Reflection;
-using System.Text.RegularExpressions;
 
 namespace MicronSync
 {
@@ -79,6 +77,18 @@ namespace MicronSync
         }
         private bool _EnableBackup;
 
+        [SaveToConfig]
+        public bool OverwriteBackup
+        {
+            get { return _OverwriteBackup; }
+            set
+            {
+                _OverwriteBackup = value;
+                OnPropertyChanged();
+            }
+        }
+        private bool _OverwriteBackup;
+
         [SaveToConfig]
         public int CompressionLevel
         {
@@ -91,17 +101,6 @@ namespace MicronSync
         }
         private int _CompressionLevel = 4;
 
-        [SaveToConfig]
-        public bool InBackupMode
-        {
-            get { return _InBackupMode; }
-            set
-            {
-                _InBackupMode = value;
-            }
-        }
-        private bool _InBackupMode = true;
-
         [SaveToConfig]
         public string RootBackupSource
         {
@@ -209,6 +208,25 @@ namespace MicronSync
         }
         private string _PathRestoreDestination = "";
 
+        [SaveToConfig]
+        public bool InBackupMode
+        {
+            get { return _InBackupMode; }
+            set
+            {
+                _InBackupMode = value;
+            }
+        }
+        private bool _InBackupMode = true;
+
+        [SaveToConfig]
+        public int WindowWidth
+        {
+            get { return _WindowWidth; }
+            set { _WindowWidth = value; }
+        }
+        private int _WindowWidth;
+
         #region Temporary Values
 
         public string BackupSource
@@ -296,6 +314,7 @@ namespace MicronSync
         public int Load()
         {
             int errors = 0;
+            bool validConfigFile = false;
             try
             {
                 foreach (var item in GetType().GetProperties())
@@ -316,6 +335,8 @@ namespace MicronSync
                                     Version readValue = null;
                                     if (Version.TryParse(line.ToString().Replace(item.Name, "").TrimStart('='), out readValue))
                                         errors += CheckConfigVersion(readValue);
+
+                                    validConfigFile = true;
                                 }
                             }
                     }
@@ -326,6 +347,13 @@ namespace MicronSync
                 errors++;
             }
 
+            // Check config file is valid before continuing
+            if (!validConfigFile)
+            {
+                MessageHandler.errorMessage(MessageHandler.errCodes.Config_BadFile, openFile);
+                errors++;
+            }
+
             return errors;
         }
 
diff --git a/MicronSync/MicronSync.csproj b/MicronSync/MicronSync.csproj
index e5d59bc..3aaa5a8 100644
--- a/MicronSync/MicronSync.csproj
+++ b/MicronSync/MicronSync.csproj
@@ -138,6 +138,7 @@
     <Compile Include="Components\Forms\WorkerUI.Designer.cs">
       <DependentUpon>WorkerUI.cs</DependentUpon>
     </Compile>
+    <Compile Include="Components\SimplerAES.cs" />
     <Compile Include="MainWindow.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -145,6 +146,11 @@
       <DependentUpon>MainWindow.cs</DependentUpon>
     </Compile>
     <Compile Include="ManageCfg.cs" />
+    <Compile Include="Settings.Designer.cs">
+      <AutoGen>True</AutoGen>
+      <DesignTimeSharedInput>True</DesignTimeSharedInput>
+      <DependentUpon>Settings.settings</DependentUpon>
+    </Compile>
     <Compile Include="Startup.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <EmbeddedResource Include="Components\Forms\AboutBox.resx">
@@ -181,6 +187,7 @@
       <DependentUpon>Resources.resx</DependentUpon>
       <DesignTime>True</DesignTime>
     </Compile>
+    <None Include="app.config" />
     <None Include="app.manifest">
       <SubType>Designer</SubType>
     </None>
@@ -198,6 +205,10 @@
   <ItemGroup>
     <EmbeddedResource Include="Components\Forms\ChangeLog.txt" />
     <Content Include="MicronSync.ico" />
+    <None Include="Settings.settings">
+      <Generator>SettingsSingleFileGenerator</Generator>
+      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
+    </None>
     <None Include="SKGL.dll" />
   </ItemGroup>
   <ItemGroup>
diff --git a/MicronSync/Properties/AssemblyInfo.cs b/MicronSync/Properties/AssemblyInfo.cs
index 866a9d0..ff84703 100644
--- a/MicronSync/Properties/AssemblyInfo.cs
+++ b/MicronSync/Properties/AssemblyInfo.cs
@@ -33,7 +33,7 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.2.5.0")]
-[assembly: AssemblyFileVersion("1.2.5.0")]
+[assembly: AssemblyVersion("1.3.0.0")]
+[assembly: AssemblyFileVersion("1.3.0.0")]
 [assembly: NeutralResourcesLanguage("en-GB")]
 
diff --git a/MicronSync/Settings.Designer.cs b/MicronSync/Settings.Designer.cs
new file mode 100644
index 0000000..f1b080e
--- /dev/null
+++ b/MicronSync/Settings.Designer.cs
@@ -0,0 +1,78 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace MicronSync {
+    
+    
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "14.0.0.0")]
+    internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
+        
+        private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
+        
+        public static Settings Default {
+            get {
+                return defaultInstance;
+            }
+        }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("False")]
+        [global::System.Configuration.SettingsManageabilityAttribute(global::System.Configuration.SettingsManageability.Roaming)]
+        public bool UseDarkTheme {
+            get {
+                return ((bool)(this["UseDarkTheme"]));
+            }
+            set {
+                this["UseDarkTheme"] = value;
+            }
+        }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("")]
+        [global::System.Configuration.SettingsManageabilityAttribute(global::System.Configuration.SettingsManageability.Roaming)]
+        public string UserLicenseKey {
+            get {
+                return ((string)(this["UserLicenseKey"]));
+            }
+            set {
+                this["UserLicenseKey"] = value;
+            }
+        }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("")]
+        [global::System.Configuration.SettingsManageabilityAttribute(global::System.Configuration.SettingsManageability.Roaming)]
+        public string UserMAC {
+            get {
+                return ((string)(this["UserMAC"]));
+            }
+            set {
+                this["UserMAC"] = value;
+            }
+        }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("")]
+        [global::System.Configuration.SettingsManageabilityAttribute(global::System.Configuration.SettingsManageability.Roaming)]
+        public string UserName {
+            get {
+                return ((string)(this["UserName"]));
+            }
+            set {
+                this["UserName"] = value;
+            }
+        }
+    }
+}
diff --git a/MicronSync/Settings.settings b/MicronSync/Settings.settings
new file mode 100644
index 0000000..47b2430
--- /dev/null
+++ b/MicronSync/Settings.settings
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='utf-8'?>
+<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" CurrentProfile="(Default)" GeneratedClassNamespace="MicronSync" GeneratedClassName="Settings">
+  <Profiles />
+  <Settings>
+    <Setting Name="UseDarkTheme" Roaming="true" Type="System.Boolean" Scope="User">
+      <Value Profile="(Default)">False</Value>
+    </Setting>
+    <Setting Name="UserLicenseKey" Roaming="true" Type="System.String" Scope="User">
+      <Value Profile="(Default)" />
+    </Setting>
+  </Settings>
+</SettingsFile>
\ No newline at end of file
diff --git a/MicronSync/app.config b/MicronSync/app.config
new file mode 100644
index 0000000..fc9aa9a
--- /dev/null
+++ b/MicronSync/app.config
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <configSections>
+        <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
+            <section name="MicronSync.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
+        </sectionGroup>
+    </configSections>
+    <userSettings>
+        <MicronSync.Settings>
+            <setting name="UseDarkTheme" serializeAs="String">
+                <value>False</value>
+            </setting>
+            <setting name="UserLicenseKey" serializeAs="String">
+                <value />
+            </setting>
+        </MicronSync.Settings>
+    </userSettings>
+</configuration>
\ No newline at end of file
diff --git a/MicronSync/bin/Release/MicronSync.exe b/MicronSync/bin/Release/MicronSync.exe
index 5604335..d1a01d1 100644
Binary files a/MicronSync/bin/Release/MicronSync.exe and b/MicronSync/bin/Release/MicronSync.exe differ
diff --git a/MicronSync/bin/Release/MicronSync.exe.config b/MicronSync/bin/Release/MicronSync.exe.config
index 88fa402..fc9aa9a 100644
--- a/MicronSync/bin/Release/MicronSync.exe.config
+++ b/MicronSync/bin/Release/MicronSync.exe.config
@@ -1,6 +1,18 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <configuration>
-    <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
-    </startup>
+    <configSections>
+        <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
+            <section name="MicronSync.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
+        </sectionGroup>
+    </configSections>
+    <userSettings>
+        <MicronSync.Settings>
+            <setting name="UseDarkTheme" serializeAs="String">
+                <value>False</value>
+            </setting>
+            <setting name="UserLicenseKey" serializeAs="String">
+                <value />
+            </setting>
+        </MicronSync.Settings>
+    </userSettings>
 </configuration>
\ No newline at end of file
diff --git a/MicronSync/bin/Release/MicronSync.pdb b/MicronSync/bin/Release/MicronSync.pdb
index 7c2df54..ee86bfa 100644
Binary files a/MicronSync/bin/Release/MicronSync.pdb and b/MicronSync/bin/Release/MicronSync.pdb differ
diff --git a/MicronSync/bin/Release/MicronSync.vshost.exe.config b/MicronSync/bin/Release/MicronSync.vshost.exe.config
index 88fa402..fc9aa9a 100644
--- a/MicronSync/bin/Release/MicronSync.vshost.exe.config
+++ b/MicronSync/bin/Release/MicronSync.vshost.exe.config
@@ -1,6 +1,18 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <configuration>
-    <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
-    </startup>
+    <configSections>
+        <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
+            <section name="MicronSync.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
+        </sectionGroup>
+    </configSections>
+    <userSettings>
+        <MicronSync.Settings>
+            <setting name="UseDarkTheme" serializeAs="String">
+                <value>False</value>
+            </setting>
+            <setting name="UserLicenseKey" serializeAs="String">
+                <value />
+            </setting>
+        </MicronSync.Settings>
+    </userSettings>
 </configuration>
\ No newline at end of file