How do you delete duplicate songs from KMA files?

[Roy Dennis]

No, not unless you want to, you can just hide them in the songbook. But you have to do it manually.
Go to Tools/Edit Songs Choose multiples tab, put the * in the match field press find. This will list your full song List. Click on the "Title" header bar to list all the titles in order if they aren't already in order.
Then scroll down the list till you see your duplicate files. Use Ctrl + left click to highlight any duplicates, after you have done a small number put a tick in the box near the bottom marked "Hide In Songbook" then press Apply Changes. Then carry on selecting more.

After completing you will have to tick the box in the songbook creation dialog "Use Exclude checked items list"
And then check that item in the list of excluded items.