UPDATE IT WORKS AGAIN
Acoording to the guide you use the registration wizard to register the Theme studio. I have been noticing on the forums that a lot of people have problems with registering applications.
A site pop's up that there is an error and try it later.....but when is later...this is going on for a while. And soon I won't be able to continue using the app.
Let us all know please.....suggestion: make a sticky posting for it.