Thanks for your suggestion and advice Jeff. I was not aware of concerns regarding registry optimizes and Adobe software. I have never had issues with them...but if there is any chance of damage to adobe files then I will uninstall my optimizer too while I am at it. I need to address this when I have at least half a day to address.
It seems odd to me that Adobe sells an upgrade from CS5.5 to CS6 and then advises that you have a choice to uninstall CS5.5 or not. There was no indication during purchase or installation that advised the consumer anything regarding choices. Certainly there was no indication that when completed I would have two master collections suites on the same machine with a choice to delete one.
Is there any reason you can think of why anyone would want or need to have both CS5.5 and CS6 on the same computer? I'm just curious. I am not at all trying to be combative or irritating here. I am genuinely interested if there is a compelling reason that I am not aware of.
jeff, i do Really appreciate your help and timely replies today.
Sent from my iPad
Sometimes users will keep older versions of Adobe software for compatability reasons. If they are working regularly with users who are using older software versions they may need to have an older version installed as well for full compatability. I know this has been the case with InDesign in the past although this issue has been more greatly reduced in CS6.
In addition users of third-party plug-ins or utlities might also still need access to the old version until the third-party vendor releases and update for plug-in/utility.
Finally there is the learning curve involved with adjusting to the most recent version. If you are in the middle of a creative project with a looming deadline you may want to continue to use some of the older software until your deadline has passed and you have the bandwidth to become familiar with new workflows and processes in the latest version.
Hope this helps? This at least is many of the reasons users have given me throughout the years on why they still utilize or wish to retain the older version. Personally I keep a couple versions back installed but that is mainly for support purposes. 
AdChoices