milon Isn't there a built in tool to search for duplicates? I'm certain I've used it before. Check the Tools menu. You still have to confirm each action, but it's better than doing it all by hand...
Yes, there is. And even in the latest release - 2.94 RC3? - It's still in the same location in the Tools menu, and then under Songs. But -
When I use it, I click the description screen Next button and immediately my computer registers that OpenLP is not responding. (I might have some screens wrong. I'm currently leaving OpenLP running to see if it sorts itself out. and I'll update this comment if it ever does get itself sorted. Or maybe I'll have to force quit it once again and then I'll be able to update the names of the menus and screens.
This is the fourth attempt at using this 'wizard'. The OpenLP not responding message has occurred on each previous occasion, but I haven't been able to leave it running for more than about 15 minutes at a time. I don't know if this message would or should appear only whilst OpenLp is trawling through the list of songs to determine which songs are duplicates.