license problem

Is there any way to tell which of my 2 licenses has been assigned to which PC?

Background: I have 2 PCs which ran ATI w/o Problems. I'm presently busy migrating to Win 7 64 bits with a SSD on 1 PC and to a new motherboard with SSD on the other. On this occasion I have also changed the PC names.
That resulted in an error message when starting ATI: PC ID has changed (which I understand). Next I was lead thru a dialog to assign a license number to the "new" PC. While I went thru the dialog the server claimed that the license was previously assigned to my "MAIN2" PC in Sep 2013. It probably was. Next I was asked to take this license away from the "MAIN2" PC, which I did since the old MAIN2 doesn't exist anymore and subsequently assigned the license to the "new" PC. I thought that everything was ok - no error Messages. I started ATI again: error - license is assigned to another PC. Can't really be, unless I made a mistake with the licenses. Therefore my question on top.

rgds
DJB