I bought the full membersip to the PRO version, I received the confirmation e-mail, and now, when I try to activate the upgrade using the e-mail address where the confirmation notice was sent, I receive an error message that says the e-mail address I gave is not the one I used to buy the upgrade.

I have a transaction number that confirms my story.

What can I do to log in in the PRO version ?

An answer will be appreciated