I agree with these problems, I have so far I have only bought one development and had to delete it and reinstall it. I will not purchase anymore addons until I am positive that this is fixed and that the next update will not mess things up again. I downloaded airports for my local area that were freeware, they were excellent and I really enjoyed flying around them. Update # 5 finished that, CTD every time I loaded any local airport . I have removed them all just to be able to use the Sim. it’s pretty good now as I get to fly for around one hour before CTD ! Please fix the problem.