Voodoo Child, the same happened to me, and I just left it on, and it kept bugging me to subscribe.
Then after about 30 days, it wouldn't let me use the entire program, including the system parts. It just went "Sorry, you can't use this program now unless you subscribe".
So I just uninstalled, found a new registry cleaner, and got myself AVG, and I trust that antivirus just as much.
Its the best free one I believe.