First, were you using the free basic version? If so, then remove that dll from your "compiler/plugins-user" folder.
To me, it really sounds like it did not register correctly. TO test, go to your "compiler" folder and run the TGCOnline.exe file.
Do you get EZortate listed as a registered dll? It should list: EZrotate (valid certificate).
If not, then MAKE SURE that you are using the CORRECT authorization code. The only reason that I say that is because there is no real way to tell what plugin that you are registering because you just list place your e-mail address and the code. I once made the mistake of trying register something over and over again. It wouldn't work for anything. I then realised that when I bought the plugin, they also re-sent me my authorization code for DBpro. I was looking in the wrong e-mail and using the wrong code. I just kept re-registering DBpro
Anyway, if it doesn't list EZrotate with a valid certificate, then something has gone wrong in the registering process.
EZrotate!
TextureMax!
3D Character Maker!