Poker Copilot Freezing

When using HUD, Poker Copilot has started to freeze. It's been happening consistently with the last two versions at unpredictable times. Sometimes it's after 100 or so hands. Other times it's after several hundred hands.

The only way I know the program has frozen is that the HUD stops updating. When I return to Poker Copilot, none of the links will work. I can select Quit from the File menu, but the program does not end. I have to Force Quit.

I'm playing on a MacBook running OS 10.4.11.