This is an excellent mod and does exactly what it says it will do. I used it to remove duplicates from a large Magic collection to create singleton decks. Thanks so much for making and updating this!

OK, found time to add it, you can set it from 2+ to 5+ in the right click menu

Seems Reasonable, I'll add it to my todo list.

Would it be possible to make the remove duplicates option variable? That way it can be used for other stuff as well. Would personally like the option to remove ALL duplicates and only keep uniques.