Hello. I added the Vault of Magic from Kobold Press to my game as a compendium. I select the Compendium and there the Items category in my game. A lot of items including magic items from Vault of magic are listed now. That's how it is intended. If I open the Filter Results popup the Vault of Magic is not listed in the Source dropdown list. So I cannot filter by it. By the way: There are listed compendiums that I do not own. That is a little bit awkward as the sources list is very long and do not fit my compendium set up. Cheers, Marc