Studio Crashes After Editing Already Exported Movie

Whenever I open Studio, the program either crashes about every 30 seconds when I am fixing an animation that I already exported, or unexpectedly quits. I’m fixing up a short project that I already exported, and I saw some small errors I would to fix, but I can’t work on it because it either crashes or unexpectedly quits. Other projects that have not been exported run fine. I am using Toon Boom Studio 8.1 and I have OS X Mavericks. Any help would be appreciated, thanks.