I have tested IsoDraw 7.x under Windows 7 64Bit fine.
IsoDraw 6.2 will not run on Windows 7 64Bit, I had issues with the USB dongle but a driver update resolved that, however IsoDraw will not run. Error finding hardware dongle. I've trawled the net but found nothing.
Only Arbortext Isodraw 7.1 is supported for Win7 64bit - more information you casn find:
Platform Support Arbortext IsoDraw 7.1
Platform Support Arbortext IsoDraw 7.0
Here you can find latest Arbortext IsoDraw 7.2 F000 release notes: https://www.ptc.com/view?im_dbkey=127593