internal void OnDestroy()
{
// Remove the button from the Blizzy's toolbar
if (chatterer_toolbar_button != null)
{
chatterer_toolbar_button.Destroy();
}
// Un-register the callbacks
GameEvents.onGUIApplicationLauncherReady.Remove(OnGUIApplicationLauncherReady);
GameEvents.onGameSceneLoadRequested.Remove(OnSceneChangeRequest);
// Remove the button from the KSP AppLauncher
launcherButtonRemove();
}