diff --git a/ApplicationView/AdvancedControlsPanel.cs b/ApplicationView/AdvancedControlsPanel.cs
index 5c3a0497f..8fe04e5c8 100644
--- a/ApplicationView/AdvancedControlsPanel.cs
+++ b/ApplicationView/AdvancedControlsPanel.cs
@@ -67,6 +67,10 @@ namespace MatterHackers.MatterControl
 		public void ReloadSliceSettings()
 		{
 			WidescreenPanel.PreChangePanels.CallEvents(null, null);
+			if (advancedTab.HasBeenClosed)
+			{
+				return;
+			}
 
 			// remove the advance control and replace it with new ones built for the selected printer
 			int advancedControlsIndex = GetChildIndex(advancedTab);
diff --git a/ApplicationView/MainApplicationWidget.cs b/ApplicationView/MainApplicationWidget.cs
index 7e02bbd67..4e2100fc5 100644
--- a/ApplicationView/MainApplicationWidget.cs
+++ b/ApplicationView/MainApplicationWidget.cs
@@ -370,8 +370,10 @@ namespace MatterHackers.MatterControl
 			// Ensure SQLite printers are imported
 			profileManager.EnsurePrintersImported();
 
+			var guestDB = ProfileManager.LoadGuestDB();
+
 			// If profiles.json was created, run the import wizard to pull in any SQLite printers
-			if (!profileManager.IsGuestProfile && !profileManager.PrintersImported)
+			if (guestDB?.Profiles != null && guestDB.Profiles.Any() && !profileManager.IsGuestProfile && !profileManager.PrintersImported)
 			{
 				var wizardPage = new CopyGuestProfilesToUser(() =>
 				{
diff --git a/SlicerConfiguration/Settings/ProfileManager.cs b/SlicerConfiguration/Settings/ProfileManager.cs
index 8fabed8e9..e1d988c30 100644
--- a/SlicerConfiguration/Settings/ProfileManager.cs
+++ b/SlicerConfiguration/Settings/ProfileManager.cs
@@ -233,7 +233,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 				return ActiveSliceSettings.Instance;
 			}
 
-			string profilePath = Path.Combine(ProfilesPath, profileID + ".json");
+			string profilePath = Path.Combine(ProfilesPath, profileID +  ProfileManager.ProfileExtension);
 			return File.Exists(profilePath) ? LoadProfileFromDisk(profilePath) : null;
 		}
 
diff --git a/SlicerConfiguration/Settings/ProfileMigrations.cs b/SlicerConfiguration/Settings/ProfileMigrations.cs
index 3c280c979..556230388 100644
--- a/SlicerConfiguration/Settings/ProfileMigrations.cs
+++ b/SlicerConfiguration/Settings/ProfileMigrations.cs
@@ -92,7 +92,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 				jObject["DocumentVersion"] = 201605132;
 
 				File.Delete(filePath);
-				filePath = Path.Combine(Path.GetDirectoryName(filePath), printerID + ".json");
+				filePath = Path.Combine(Path.GetDirectoryName(filePath), printerID + ProfileManager.ProfileExtension);
 			}
 
 			if (fromVersion < 201606081)