There must be something wrong with the registry, perhaps a permission issue, which is the only thing that could cause the sim to crash. Try to clear the registry manually this way:
- open REGEDIT
- Look for this key
HKEY_CURRENT_USER\SOFTWARE\FSDreamTeam
And remove the "Charlotte Douglas" folder.
The question should disappear on the next startup, and the scenery will be in Trial, so you can try to reactivate it.