freezes everytime after a short while of use and then i have to shut pokertracker 3 down. the whole damn thing freezes everytime i use this feature.

if i had a dollar for everytime something went wrong with software...

this is a known issue that will be fixed in the eventual large patch that fixes a bunch of problems...

I experienced the same problem. One of a few reasons why I had to revert to PT2 for the time being. Although for the one hand that the replayer did work for, it seemed really slow, and the cards are too small. Would be lovely if they just modelled it after universal replayer.

My replayer works for looking at just 1 hand, but if replaying an entire session or SNG it freezes & crashes...

These replayer issues should be fixed in Beta 12. Please feel free to download and see if Beta 12 works for you (there are some other known issues with Beta 12 that we are working to fix ASAP . . .).

beta? i bought it already...

The way our numbering scheme works is, roughly, like this:
Start with Build A. Build A is considered stable.
Attempt to implement feature/fix Y and Z. Release an Alpha build to see if things work as planned. After a short amount of alpha testing, (fixing what nees to get fixed), release a Beta version to have more general testing. After some amount of beta testing, release the next build, Build B. Then repeat the process. So there will continue to be Beta builds, which may be less stable than the official Builds. If the last Build works for you, you shouldn't need to upgrade. In this case, there was a known issue in the Build that we have confirmed is fixed in the Beta. The reason the Beta isn't Build 3 is because there are still some issues with it that we're working (quite hard) to try and resolve. Once they are resolved it will be released as Build 3.