[ddouglass]

For Robbo and Bob:
Did you "Upgrade" or "Remove" and install when this happened?

If you did the "Remove" did you delete any folders after removing Hoster?

Were your KMA files in C:\MTU\KMA Files folder when they disappeared?

When you did the Rebuild was the correct folder listed in the white area of where the KMA files were located?

Do you have any other copies of the Songs.mdb file on your computer (hold overs from previous versions)? These could be in the Program Files folder for Hoster or in the Documents and Settings folder under All Users. If you find any other than the one in C:\MTU\Hoster delete them.

When you did the database Rebuild, did you "Rebuild" or "Add"?

Robbo, try closing Hoster, deleting Songs.mdb, Songs_Backup.mdb and Temp_Songs.mdb files from C:\MTU\Hoster, then re-open Hoster. This should make Hoster rebuild database from scratch.
If that doesn't work the do as Bob said and Re-install 4.09.