I started a similar link yesterday, I wish I had found this first, I have voted:
XBox Full uninstall reinstall or remove one addon after another?.
I am slowly removing scenery, I thought it was mainly the JustSim scenery but although having removed it the CTD are not as frequent, the sim is now freezing normally associated with a view change. Initially I thought it might be the Thrustmaster HOTAS One top hat switch but using the Xbox controller has also caused it.