Did not know about any of the above things you mentioned to do before signing up for the beta software program. I wanted to run the new software to get to know my Mac Book Pro as I was transitioning from a pc. Learned a lot but is there a easier way to "down grade" to the official release?It's easy, you just change boot drive to the clone you made with superduper before upgrading.
the official is 10.11 and you have a more recent version with relevant updates. Any reason you would like to roll those back?
Did not know about any of the above things you mentioned to do before signing up for the beta software program. I wanted to run the new software to get to know my Mac Book Pro as I was transitioning from a pc. Learned a lot but is there a easier way to "down grade" to the official release?
<sigh> The beta program is not there for chasers of shiny things. Apple explicitly warns that beta code should not be used for work/production/important purposes - and it has zero value in getting you "used to your mac". You have to go past those warnings when you signed up for the beta program.
Presuming you haven't started any backup regime whatsoever I'd strongly suggest you start one, an external drive and Time Machine are all you need. As for your machine, I suspect Internet Recovery is your only option, you will lose any data or settings you have created/changed since the install.
All I did was unregister my Mac like the instructions said and installed the new El Capitain and voila all done, no loss of anything or clone making or anything else.