I was activated with 8.1 pro and upgraded to 10 pro (x32). Let it activate. Worked fine, but I wanted to use x64 pro, because I have an x64 system. So since it was already activated I thought I could do a clean install of the X64 and stay activated. It didn't. work. Is there any way I can activate? Or do I have to go back and install 8.1 pro x64 and do everything again?