Mouse Inverting By Itself

Had yet another flight cancelled halfway there on the VA clock… Mid-flight, my mouse inverted. I can’t figure out how to fix it. In the controls, it only allows me to select button clicking. I can’t assign a left mouse move even if this was the way to fix it. Never seen my computer invert my mouse mid-flight in 40 years of using sims. Fenix A320 if that has anything to do with it. Totally immersion destroying. I’m not re-starting the flight so I guess I have to wait until tonight to re-try it. Nothing worse than planning a flight for two hours, getting airborne finally and then having to duck out halfway there. A total waste of time. Is this sim ever going to be right?

Or is it because I hauled of and put something in my community folder again?