Thank You Vulcan... Reinstalled the Game again. That problem is gone I think, but now.... I get a screen glitch and the motor quits. Generally, in the middle of ACM. When the glitch stops. About a second, I have to restart the engine and its usually okay until the next flight. Maybe a Video card conflict? I never used to have these issues until the Quest Headset so maybe that is the primary issue. Not technical enough to trouble shoot. No issues in 2D at all or in DX 9. But then... no headset.