I own Holodexx Home and Ep1 and have played them. Recently purchased Episode 2. I downloaded Ep 2 from the email link, but it does not show up in my itch.io account. . . I reinstalled Home and Ep 1 to get the latest version. . . I put the Ep 2 pak in HDX/Content/Paks . . . the Ep 2 cartridge is there, and I can pick it up, but I've waved it all around the slot and nothing happens.
Viewing post in HDX Home EP2: Euphoria Evolved comments
Here ya go, wrote out an installation guide. This should help
https://holodexxx.itch.io/hdx-home-ep2/devlog/155890/installing-holodexxx-home-and-episodes