Hi Eric,
I'm not quite sure I understand why you want to re-purchase.
Seems you have two permanent CodeWarrior Professional Suites already activated.
Permanent means the license itself does not expire.
The expiration you observe (Jun/18/2015) is the support certificate which is valid one year after the activation.
So if you'd like to renew support contract please check this video:
How to renew your Software|NXP
Anyway if you are interested in CW for HC12 license only then the license you have (assume v5.x) should work with the latest available release which is v5.2.
Hope it helps.
Stan