We have customer owning 10 Adobe Production Premium CS6 packages. And he expiriencing huge problem, after activation, sometimes it was offline cause Workstations were moved from one location to another without internet, and we were forced to process offline activation. After activation all programs activated and starting as it should, but Encore on startup raising error window "Trial Period expired please entere valid serial number to continue" with small OK button in the center, when you press it Encore closes without any additional information or input dialogs or activation. So it's stupid and it's problem, Production Premium CS6 is activated but single package from suite not, but should and i don't see any buttons or options saying activate encore here! or enter valid serial number here!.
So in such obstacles how to start Encore ? Cause it's bought and customer want to work with it and he can't at all, not even in demo/trial mode.
This is a user to user forum, with the space provided by Adobe, not Adobe support
Adobe staff RARELY post here, so I think you need to contact Adobe directly
But, some links that may (or may not) help
Missing Presets/Activation http://forums.adobe.com/thread/1050730?tstart=0
In the US - Adobe Install Problems 800-642-3623
In the US - Adobe Activation 866-772-3623 Open 24/7 as far as I know
Adobe Activation note in #4 9-11-09 http://forums.adobe.com/thread/488108
Forum for Download & Install & Setup problems