I have used it on a 64 bit W7 machine for well over a year with no problems, A blanket statement like it will hose a 64 bit machine is totally inaccurate. What service in "God Mode" did you use that hosed your machine. All god mode does is bring together the various individual items you could find and run under W7 individually and puts them in one place of folder called "God Mode" it is not a program but a folder that contains a lot of Programs consolidated in one folder.
I have used it on a Vista 32 bit machine no problem. I do not have a 64 Bit Vista machine so I cannot comment on whether it works on a Vista 64 bit machine