Just load it up with the CAS file not present in the save folder. If it still crashes, import one that you know works into the same slot as the bad one, and then just don't include the CAS file, the game will delete it automatically. This is why I always recommend doing one CAW at a time. It may take longer, but then you know which one is the culprit. I always only do one at a time, I never add more than one at a time.