I have been using the Mezzmo on a Win 8.1 as well as Server 2008 R2. The Win 8.1 machine works fine. The Server 2008 R2 machine has been problematic and now I have it corrupted or something.

Whenever I had to update settings and it prompted to close and restart server- and I said yes, it would hang and never do it. I have killed it and restared many times, then I uninstalled and downloaded the newer version, now it shows as not registered. So I bought a license and entered it but it still shows not refistered and the register menu item is gone- so i think the license is in there.
A pop up keeps telling me the server could not be registered on your computer.