Encore CS6 is asking for a serial number at launch even though I am a CC sub. That's new.
At that point I contacted Adobe and spent a minutes with a rep, no help.
" We do not support encore anymore , so please visit http://community.forum/ Please contact 1800-833-6687. If you want me to connect you with our subject expert the please share your contactable number, preferred timing to call and your time zone."
I left my phone number and timing info, and I tried one more time to sign off and back in.
I launched Premiere CS6, it asked if I wanted to start in trial mode or sign in. I did sign in and then I launched Encore and this time IT WORKED!
I cancelled my phone support request.