While in flight and on autopilot, if I go to make a change weather it be in views, options, aircraft or any of the choices, and then hit OK and go back to my flight, all my intial navigation input, lighting, auto pilot settings etc..have all gone away.  It's not remembering any of this. The plane noses way up and I have to adjust for that to avoid a stall and then reset everything.  I've done reinstalls, cleaned registry, deleted old flights. Nothing seems to help. this problem just came up and is now reoccuring everytime I fly. Anyone have have any idea?. The fun never seems to end.