GTR 64 bit problem fixed, with caveat.....
After Waves support helped out for an hour, we finally found the problem. In Windows 7 64 bit only, in the Program Files(86) folder,GTR V6 left an empty folder (GTR I think) which caused the crash, as it looked there instead of the new folder(Waves_GTR, I think). This crashed the stand alone as well as the VST in a DAW. Removing the offending folder did the trick.
The one caveat is that the Tuner "Needle" no longer appears when tuning a guitar or bass. Unfortunate.