again, Vid's tips:
- quit Fred
- remove everything from your TBP/data/missions folder
- move the missions of the campaign in TBP/data/missions. Nothing else should be in there.
- restart and don't load a mission, go for the editor right away
- do your missions and loadout stuff. Do it without saving anything.
- try to be sure what to do in the firstplace. Don't reedit stuff, don't make changes but then press cancel.
- after you are done: try saving and pray if you believe in some kind of higher being(s)
IF it crashes: Best restart your PC before trying again.
Note: I don't have any problems with the CE anymore, since I reinstalled. But only try that if you are extremely desperate.