[Roy Dennis]

You should be able to just copy the files from the quarantine folder and paste them back in their original folders.
The kma's are the full file but the kmh are just the kmh header so they must go back into the folder with their matching MP3 file.
The question is why did it move them to the quarantine folder ?

It found something wrong to do that.

It may be it found them as duplicate files.
Check down your list of folders in the rebuild database dialog, the bottom left column, that you don't have folders listed in duplicate someway. Like do you have a backup of your files also listed there. In which case it would treat them as duplicates. If so use the Exclude folders button to remove that file path from the list. Also un-select any of the song types in the top part of the dialog so that it only tries restoring the original kma or kmh files.

Then what I would do is delete your songs.mdb, to do that open Hoster Tools/Hoster Data Folder close Hoster but leave the folder open and find the songs.mdb in there and delete it.

Now make sure your if your songs are on an external drive it's connected then start Hoster. It should start building your database before opening so don't interfere with it till it finishes.
Let us know how you get on from there.