[stefbeme]

To start from scratch I would do the following assuming your still using version 5.10
Open the Tools Menu/Hoster Data Folder then close Hoster but leave data folder open, find the "HosterInfoIndexed.ini" file and delete it.
Now start Hoster and go to the rebuild database dialog, your list of folders to index should show a blank list, rebuild the database now and it will build a blank empty data base. If the list is not blank select whatever is showing in it and see if any files show in the right hand pane, you don't want any songs to show in it at this point.
Now assuming you have edited all the duplicated (2) &(3) copies from the kma folder and there are no other type of files except kma's in the folder, Add that folder to the list of folders making sure first none of the "Song types to index" buttons are selected.
Hoping this time it does not show too many duplcates.
I have completed this process. There are 2409 duplicate files. But I also noticed there are over 14,000 files in that folder, it only imported 1994. This does not make sense. I may want to start with scratch with the 500+ CDG's. It is 2 weeks before my next show.
What are your thoughts?