If this isn't a feature that exists, it should be. I like buying charity and event bundles when I can. I have no idea what constitutes 90% of my library. It would be really nice to be able to check if I've got a thing.
For you and anyone else viewing - I just discovered that itch has a desktop app???? Just tried it out, and it has sorting and searching functionality for your library and the ability to "install" assets - which I'm guessing keeps track of where the files are.
itch does have a desktop app but it is extremely basic and for most things is just a thin wrapper around the website. For me personally, using it is just annoying.
