Hey Patrick,
When you enter your product key on during setup, the installer puts the key in HKLM. When you enter the key inside wyBuild the key is put in HKCU. The reason it's a different location depending on when you enter it is that the installer is guaranteed to have UAC elevation (and thus can install to HKLM without impediment), while wyBuild has no such elevation.
The quick solution is to re-install the latest wyBuild and enter the product key during the setup. Then you'll be able to use whatever user you want.