I checked my Extension Manager one more time and saw that there was a "Skype button" extension installed. I checked and found that the Communication Toolkit for Skype was on the list of conflicting extensions so I removed the Skype button extension, rebooted my computer and installed the Free Tools before launching any other apps. When I launched Dreamweaver this time I still got the three errors followed by the one error, but the program did not lock up as before. I'm able to use it.
I then exited Dreamweaver, deleted the cache file and launched Dreamweaver. I'm still getting the first two errors before the program loads and the final error when the UI comes up. Any further ideas on what's going on?
Thanks for your help!