Yes - I have a 64 bit also. Let me know if you have found a fix.
The software (HD Writer AE 1.5) that came with my Panasonic HD camcorder crashes my computer when I am playing back a video. (It buzzes and then black screen.) So I can not play or edit my video. Panasonic tells me that it is because I have a 64 bit computer. (New HP e9200Z tower with 6GB RAM,640GB hard drive, Windows 7, and 512MB Nvidia video card.)
Does anyone know of a fix? What about other software?