[Roy Dennis]

When open the build database dialog, if the folders are still listed there that no longer exist can you not select one then press the Exclude folder button to remove it ?
If it won't allow you to do that probably because it doesn't exist you can remove all folders from the list by first closing Hoster then open the C:\MTU\Hoster folder find the "HosterInfoIndexed.ini" file and delete it.

Then open Hoster build database dialog and Press the Rebuild database button, this will clear out the old database first. once thats finished just Add the folders that you want in your database using the Add Folder Button adding them one at a time or if they are in sub folders use Add Sub folders option.
Highlight the type buttons that you are importing before using the ADD folder button (unless you have previously indexed these folders). Hoster will first scan that folder for existing KMH files then add any new found files after. As you add the folders it should add their contents to the new songs database, if not use the rebuild database button when you finish adding all the folders.