Hi jtrag, welcome to the forums.
This particular beta (3.0.10.238) is for AMD64 only.. might be OK for ENT64 (not sure.. anybody?), but it certainly doesn't play nice with Intel x64. I do hope that didn't ruin it for you.
This was certainly a disappointment for me. I uninstalled the previous beta and then tried to install the latest on my Duo2 x64 Vista with no go.

I hope that the next release has something that will work for me.