Success!
Here are the additional steps I took after doing all of the above:
- Ran a JAVA update that popped up in the App Store. (Can't imagine that it was the factor but have to mention it in case.)
- Ran CC Cleaner.
- Removed the files from the HD>Library>Preferences>Adobe folder. These files remained after running uninstallers that were told to remove preference files AND after running the CC Cleaner.
- Reboot
- Ran Installer