I just bought 2 copies of NFS:HP but screwed up when signing into Autolog.

I have 2 computers with Need for Speed Hot Pursuit installed on them and I accidentally put the same Autolog log in info on both of them. Now I cannot play multiplayer. I want to change one of the Autolog accounts to a new account, how do I do this, can anyone help? I have 2 copies of the game with the reg codes, but the Autolog thing doesn't have any options to change the account and I cannot find where it stores it on my PC.