Re export the claw items and click replace when you do so; it sounds like there's doubles in that folder. That might be the problem. Also, when you reinstall, save all presets, maps, etc somewhere other than FH so they aren't lost!
Look in the followin' folders:
Exports
Particles
My_Objects
and see if there's any duplicates endin' in _1, _2, etc. Delete said duplicates in the correspondin' folders and see if that'll work for ye' since it now sounds as if it's yer maps that's causin' the game to crash.