The paid for version I have got me a 2227c version of PD7 Ultra. I recently build a new i7 system and everything was working fine. Except, PD7 was very unstable with HD files at that patch level (and Vista x64 - who knows).
I know I can't use the 2519 patch because it breaks motion effects and I use those a lot. I still had a copy of the 2429a patch, so I used that. It fixed most of the stability issues I have.
Although now I can not drag and drop media files into PD7 like I use to be able to. I have to import them (annoying).
I uninstalled PD7, deleted it's directory and reinstalled the 2227c install app I had. I still can't drag and drop!
Reg entry maybe??? Every time I think I get PD7 running good something else comes up that drives me nuts.