I recently installed Win7 x64 Ultimate on a MacPro. Typhoon installed fine, and when I checked for updates I was informed I had the most up-to-date version.
Every time I run AutoRun, the program launches fine and I can work within my project (old or new) fine. Then, without any real warning, I get an error stating "AutoRun Typhoo has stopped working". "A problem caused the program to stop working correctly. Windows will close the Program and notify you if a solution is available." This happens at different intervals, and even if I'm not currently attempting to work within the program or update a project, as such, no actions can be pinpointed as a problem. I have to be very careful to save every time I make a change to my project so I don't lose my progress.
The program was working fine with my previous x64 Vista Ultimate install on the same MacPro. I have the properties set on the shortcut I use to launch to always "run as administrator".