I don't know why I thought it didn't. It is installed in c:\radio\spectrum and it works just fine. I also run it as an administrator with full permission set to its folder branch just to be sure. So far, it's done everything it did in XP.
People might know that I really like Spectrum Lab, so it's nice to have it back. Its window scales any size one would ever need it to be, and you can spend the rest of your life getting acquainted with all it can do. I've even made digital art with it.
