This really is not a very helpful post. You do not have any shows, so you must be playing the demos.
How frequently does it crash? Every show? Every hour or two? Every time you try and start the program?
You say it 'now keeps crashing', does that mean in the past it did not?
Chances are it is a broken clip (download failed). OR a broken control model.lst file.
The first is difficult to find. The second go to Settings > Advanced > right click sync server and rebuild all.