It's getting worse for me with each release :(

[Alien]

My experience with pokertracker 3 so far has been:

Build 2: No problems at all
Beta 12: HUD Crashes from time to time + a new task in my taskbar per each table I minimized
Beta 13: Same as Beta 12 + my PC completely blocked once (of course, when i was holding a couple of great hands, but that's Murphy's fault)

I moved to beta 12 because Build 2 expired and I couldn't run it anymore

Is it possible to go back to Build 2 somehow?

[WhiteRider]

Did you submit tickets (error reports) for you problems?

Have you tried Beta 14? That improves things for most people.
Build 2 is still available on the Download page, with an extended expiry date.