Add Setting Upgrade

Source/GrasscutterTools/Forms/FormMain.cs

@@ -47,6 +47,19 @@ namespace GrasscutterTools.Forms
             Common.KeyGo = new KeyGo(Handle);
             Common.KeyGo.HotKeyTriggerEvent += OnHotKeyTrigger;
 
+            try
+            {
+                if (!Settings.Default.IsUpgraded)
+                {
+                    Settings.Default.Upgrade();
+                    Settings.Default.IsUpgraded = true;
+                }
+            }
+            catch (Exception ex)
+            {
+                Logger.W(TAG, "Upgrade Settings failed.", ex);
+            }
+
             try
             {
                 var location = Settings.Default.MainFormLocation;