Backup Exec license upgrade

Hello,

we recently decide to upgrade our old Backup Exec 12.5 on windows server 2003. We installed Backup Exec 15 on a new windows server 2012 r2 and we recreated all jobs we need. Now the new backup exec is in evalutation mode and we need to add licenses. On veritas licensing portal I found agents licenses and i think i have to click return and generate new keys, then add them into the new Backup Exec. Am I right? If not, how i can move licenses from old Backup Exec to the new?

Another question is that i can't find the "Base License" on the portal and i don't know how to upgrade/migrate for the new server.

Anyone can help me ?

Thanks