hmmm there could a few reasons why one reason might be that your model is way to high poly, taking alot of ram to run with the fps creator software which is causing it to crash. It seems far fetched but could be possible
you could try reinstalling fps creator, i been hearing that some of the updates can cause problems, if you don't have any updates they might actually what can remedy the problem (pretty confusing i know)
well i really can only go on these sort of software problems as any other problems I'm really not familiar with.