UE4 4.9.2 FBX Import Crash

Hay guys, UE4 4.9.2 keeps crashing when Importing FBX files, it doesnt matter what the mesh is that im importing (it could be a simple low poly cube that i just made) it just crashes. I have looked over the export options over and over and they all seem to be the same as to what i normal export out as. OBJ files import fine, its just the FBX files, has anybody got any suggestions, iv not a clue what to do :s

EDIT: I just tried importing on version 4.7.6 and it seems to be ok. I dont know why it all of a sudden just wont import on version 4.9.6 and i cant change as im already half way through a project :s