What does Google say? A simple search along the lines of "Pinnacle Studio 14 Vista 64-bit compatibility" should be quite enlightening.
Generally speaking, there's no real compatibility difference between the 64 and 32-bit versions of Windows except that the 64-bit versions have no 16-bit support. That's no loss, because all of that should have been left behind a decade ago if not more. Otherwise, typically any app that will run on the 32-bit Vista will run on the 64-bit version. There are a few minor exceptions, but as a general rule. I don't know why it is people seem to freak out because one OS is 64-bit and the other is 32-bit. There's virtually no difference as far as the average user is concerned.
I've read some horror stories on forums about people who installed Pinnacle Studio 12 on 64 bit computers with Vista.
Has anyone used Pinnacle Studio 14? I understand it is compatible with 64 bit Vista but would like to get any personal experience information possible.