I'm in the same situation. I read another forum about launching InDesign or Photoshop (http://forums.adobe.com/message/4473199)...
From Adobe Staff:
"The workaround we have right now is to:
Launch any other CS6 product (such as Photoshop or InDesign)
It will pop-up trial screen at launch.
Click on License this software and restart subscription.
Launch Acrobat X after this. It should launch fine
Our engineering team is working on getting a permanent fix available for this issue."
Maybe this will help you. So far, it has not helped me. :-(