I had made no changes at all on the computer between the last time it worked (the day before) and when it started crashing. No, I had my default start up my A2A C172, not the F22. It had been working for at least a couple of years (since I first purchased the Mindstar GPS). But even when I start P3D with the default F22, it makes no difference. As soon as I try to load the C172 with Mindstar, P3D crashes. If I load the C172 without Mindstar enabled, it doesn't crash.