Is your database a lot larger now than the last time you successfully purged? Roughly how big is it?
The purge can take quite some time in very large databases, and can appear unresponsive for a while at the start. I wouldn't expect that to happen when purging a single cash session, though.
What exactly happens when you click on PT3? Does it say it is not responding, or does it actually crash and disappear? Do you get any error message?
Please enable logging and restart PT3 then attempt to purge a single cash session. Let it run for a long time (e.g. start it when you are going to be away from your computer for a while, or overnight). If it crashes (or still shows as not responding and crashes when you click on it) attach the PokerTracker.log file to a
Support ticket.
Thanks.
Tutorial: Submitting a Bug Report