Hooray! The second one worked. I exported to GED and then opened the GED, and virtually all of the dups were gone. There were a few still there, but they are probably old dups left over from an earlier version of FTM. I had tried the replace option, but it only replaces one at a time, and then inconveniently returns you to the top of the list, so you have to scroll back to the next one to replace it too.Anyway, Thanks!