diff --git a/TarsierSpaceTechnology/TarsierSpaceTech/TSTSettings.cs b/TarsierSpaceTechnology/TarsierSpaceTech/TSTSettings.cs
index 0588908..52e58d1 100644
--- a/TarsierSpaceTechnology/TarsierSpaceTech/TSTSettings.cs
+++ b/TarsierSpaceTechnology/TarsierSpaceTech/TSTSettings.cs
@@ -109,6 +109,8 @@ public void Update()
 
         public void OnDestroy()
         {
+            GameEvents.OnGameSettingsApplied.Remove(ApplySettings);
+
             TSTsettings.Save(globalNode);
             TSTstockplanets.Save(globalNode);
             TSTrssplanets.Save(globalNode);
@@ -116,7 +118,11 @@ public void OnDestroy()
             TSTnhplanets.Save(globalNode);
             globalNode.Save(globalConfigFilename);
             Utilities.Log_Debug("TSTMstStgs OnSave: \n {0}" , globalNode.ToString());
-            GameEvents.OnGameSettingsApplied.Add(ApplySettings);
+
+            if (Instance == this)
+            {
+                Instance = null;
+            }
         }
 
         private void ApplySettings()
@@ -520,4 +526,4 @@ public void Save(ConfigNode node)
             Utilities.Log_Debug("TSTNHPlanetOrder save complete");
         }
     }
-}
\ No newline at end of file
+}