The itch app isn't downloading the update for some reason. I have force checked multiple times and have told it to download the new update, but each time the game still launches into chapter 5 only. I don't know if this is something that can be fixed on the dev's end or not, but I figured I would post here just in case.
EDIT: Figured it out, for some reason the itch app isn't recognizing the mega link for downloading the update, so I'm having to manually install it instead.