I've poked around and never found anything definitive in fixing this issue..
Here's What I've got...
I tried installing MMOviper to this (a third) computer before seeing that I can only do 2 computers..

I bought a 2nd license...

Now trying to boot with the new username and password I get "1.account expired please visit website to upgrade your account..."

Can someone help me fix this please?

This account shows as premium. If you just purchased under this name, give it a few hours for the bot to update.