I really love your product, and I use it regularly cause I'm really bad at keeping order and it helps me to find back some disk space
I regularly download comics, manga, etc and they usually come in archives which I extract to look at the images they contain. But I often forget to delete the folder or the archive. Currently DC does not notice that. It would be cool if it was able to hash the files inside the archives as well so that I notice this overlap. Personally I would not need the ability to delete from the archive, just getting a pointer about the overlap would be nice.