ok, more simply. You'll have to re upload all of the files at this point I believe. I don't think they'll show up again on their own. If you allready have a copy of everything on your computer, then just upload it all again.
If you don't have a copy of everything you can access it from a hidden directory with FTP. Just use Dreamweaver's FTP and log in. Now you'll want to type in the directory for dreamweaver to open. DW will probably show something like / as the quasi URL. just add onto the end of what ever is there .snapshot and hit enter. Here is listed the hourly.0 hour.1 and so on. move into a backup directory from before you switched your domain settings around. then into your domain.com folder and download all of the files there to your computer. Next upload them into your empty domain.com folder where you normally put things.
Does that make more sense?