Restricted backup import functionality for #150

GBM/Forms/frmGameManager.vb

@@ -1938,7 +1938,11 @@ Public Class frmGameManager
     End Sub
 
     Private Sub btnImportBackup_Click(sender As Object, e As EventArgs) Handles btnImportBackup.Click
+        If CurrentGame.AppendTimeStamp Then
             TriggerSelectedImportBackup()
+        Else
+            mgrCommon.ShowMessage(frmGameManager_WarningImportBackupSaveMulti, MsgBoxStyle.Information)
+        End If
     End Sub
 
     Private Sub chkFolderSave_CheckedChanged(sender As Object, e As EventArgs) Handles chkFolderSave.CheckedChanged

GBM/My Project/Resources.Designer.vb

@@ -2446,7 +2446,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Looks up a localized string similar to This feature is intended to import 7-Zip backup archives compatible with the selected game configuration.[BR][BR]GBM does NOT verify these files, you should only use files created by GBM or other compatible archives that were created using the same settings as the current game configuration.[BR][BR]This message will only be shown once..
+        '''  Looks up a localized string similar to This feature is intended to import 7-Zip backup archives compatible with the selected game configuration.[BR][BR]GBM does NOT verify these files, you should only use files created by GBM or compatible archives created using the same settings as the current game configuration.[BR][BR]This message will only be shown once..
         '''</summary>
         Friend ReadOnly Property frmGameManager_WarningImportBackup() As String
             Get
@@ -2454,6 +2454,15 @@ Namespace My.Resources
             End Get
         End Property
         
+        '''<summary>
+        '''  Looks up a localized string similar to The &quot;Save multiple backups&quot; option must be enabled on this configuration to import backup files..
+        '''</summary>
+        Friend ReadOnly Property frmGameManager_WarningImportBackupSaveMulti() As String
+            Get
+                Return ResourceManager.GetString("frmGameManager_WarningImportBackupSaveMulti", resourceCulture)
+            End Get
+        End Property
+        
         '''<summary>
         '''  Looks up a localized string similar to XML.
         '''</summary>

GBM/My Project/Resources.resx

@@ -2249,9 +2249,12 @@
     <value>Pro&amp;cesses...</value>
   </data>
   <data name="frmGameManager_WarningImportBackup" xml:space="preserve">
-    <value>This feature is intended to import 7-Zip backup archives compatible with the selected game configuration.[BR][BR]GBM does NOT verify these files, you should only use files created by GBM or other compatible archives that were created using the same settings as the current game configuration.[BR][BR]This message will only be shown once.</value>
+    <value>This feature is intended to import 7-Zip backup archives compatible with the selected game configuration.[BR][BR]GBM does NOT verify these files, you should only use files created by GBM or compatible archives created using the same settings as the current game configuration.[BR][BR]This message will only be shown once.</value>
   </data>
   <data name="frmVariableManager_ErrorVariableReserved" xml:space="preserve">
     <value>[PARAM] is a reserved variable, you must enter a different name.</value>
   </data>
+  <data name="frmGameManager_WarningImportBackupSaveMulti" xml:space="preserve">
+    <value>The "Save multiple backups" option must be enabled on this configuration to import backup files.</value>
+  </data>
 </root>