I tried both of your suggestion. Now I have bigger problems.
I wanted to move the add-on domain from directory A to directory B where I have built a new site.
I tried the least invasive approach, which was to just renamed A to C, and then rename B to A. That worked from an ad-on domain perspective but causde a slew of other problem internal to the site.
Then (after reverting all of the directories to their original names) I dropped the old add-on domain. (directory and files are still there). That worked. Then i tried to create a new add on domain with the same domain name that pointed to the new directory. That FAILED with an error that I have exceeded the number of allowed FTP accounts. Huh? Say whuh?
Now instead of having an old site or a new site i just have no site. Suggestion/help would be appreciated.