The reason I couldn't get mine to work, even after deleting and UNINSTALING and REBOOTING from AVG, is that somehow...
pr.exe was the culprit. I'm a little new to Vista, so still getting used to all the bugs with this microsoft POS-OS, but....
pr.exe doesn't seem to always get killed when PO is terminated. And sometimes I have to kill it just to get stats to pop up on my overlay at tables. And I guess, somehow... rebooting doesn't kill it 100% with this BETA OS. Because somehow, it was still preventing PO from starting up after going through hoops, until I ran the old task manager and killed it manually.