Is it actually "crashing", or freezing? If it's not responding it could be that it's still working, although I don't think the hand reports were really designed to show that many hands in a single list so it's possible that many hands will cause problems.
When you restart PT4 after the problem does it offer to submit a crash report? If so, please do - these go directly to our development team and are really useful.
If not, please enable logging (Configure > Options) and reproduce the problem the attach the PokerTracker4.log file from C:\Users\yourname\AppData\Local\PokerTracker 4\ (which you can access from the PT4 File menu) to a
Support Ticket so that we can investigate.