We're so sorry to hear about your technical issues.
I saw that you also posted: http://forums.adobe.com/message/6183458#6183458 - can you confirm that you tried all the solutions posted there? If so, I can set you up with our next level of support for you. Let us know!
Rex, thanks for reporting in.
To learn what we can for others, you are a CC subscriber, with Encore CS6 installed under CC or is your EN CS6 installed as part of a previously licensed version? I don't know if it matters, but something is making this harder for some users to fix.
For others following along, the link in Rex's first post, which is the one for dealing with "CC subscriber gets request for serial number," does not include a reinstall as a fix. It does include a link to a chat, but based on Rex's experience the level of tech support it takes to deal with this is not available 24/7.
FYI, Rex, I replied to your first response so you can edit your last post to remove the personal info. One of the downsides to replying by email with an auto-signature! A moderator would remove this, but I don't know when!
Edit: thank you moderator!
Richard, I tried "run as administrator" to no avail. However, I was able to get in touch with a adobe tech today. After getting passed to about 3 or 4 different techs, one was finally able to assist me.
The tech had me open Pre Pro CC and go to "help" and click "sign-out". When you do that a pop-up appears saying that: signing out will deactivate the following software on this computer unless you sign in again; following with the icon for each Adobe CC app i have installed.
Next the tech had me open Pre Pro CS6, which upon opening askes you to sign in which I did. Once Pre Pro CS6 was open, The tech had me check under "help" to see if the the option "deactivate" was available or greyed out. For me, It was greyed out.
Next the tech had me close Pre Pro CS6 and open it again and check "help" to see if deactivate was still greyed out; and it was still greyed out.
Next the tech had me close Pre Pro CS6 and open Pre Pro CC which prompts you to sign in. After Pre Pro CC launched the tech had me close it and open Pre Pro CS6 again too check under the "help" tab again and confirm if "deactivate" was still greyed out or black (executable). This time "deactivate" was black.
Next the tech had me launch Encore CS6 tto see if it still required a serial number. This time Ecore opened as it should, without requiring a serial number.
Hopefully this stick, or Adobe includes a perminant solution in the next update.
I Hope this helps others with this same issue.
Thank you again Adobe for helping me!
I used rexomus' notes and found that all I needed to do was open Premier Pro CC and sign out under the help.
I then quit and reopened Premier Pro CC and signed back in. Now Encore CS6 opens as it should.
I don't have premier CS6 installed, so I am glad this worked without it being installed.
Hope this helps others...