Hi Jon,
All I really know is the software's not been tested under Vista 64 and so at this time, it's not listed as a compatible OS. It may in fact be it does function and there's some other outside influence here, but I believe there's another thread on this forum about Stitcher compatibility under Vista 64. Possibly one of the forum members who's using Vista 64 might be able to throw an insight in here.
No idea at all I'm afraid on QTVR in Vista 64. Wasn't even aware there was a problem!
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Andrew Baddeley
360 Tactical VR Ltd
www.360tacticalvr.co.uk