first time use plugin under wrong account

I just bought the year package and installed the plugin; unfortunately didn't use the account I bought it with...
Can't seem to be able to 'logout' and login with the correct account. Now I only have the free-membership options.
Deactivated end de-installed the plugin, reinstalled it, but no results....

Can you help me out a.s.a.p.? Can't wait to start...

regards,
Erwin Groeneveld