I have been paying for CC for a few months and Acrobat has been a trial since then (I have no idea why...). Recently the trial expired, and so I uninstalled Acrobat from my computer and redownloaded it from CC. When I opened it up, it still says my trial has expired and I need a serial # to use it. I really need this program asap to do work!!
Chat Now button near the bottom for Activation and Deactivation problems may help
-ask for serial number http://forums.adobe.com/thread/1234635 has FAQ link