Bit late to the party to ask of course, but would it be possible to do like some of the other impacted devs have done and set up a Discord ticket system? Those who bought the game provide proof, then a link is sent that has the latest update files. That or maybe a legacy page for buyers like what Heavy Hearts did a while back. Just spitballing more than anything, but give it some thought I guess, really liked everything you've done so far.
Viewing post in Lustful College v0.44 and Goodbye. comments
Actually, there's no such thing as buying the game. Under normal circumstances, you rent the game monthly on every other platform. I believe it's only on the itch.io platform that once you purchase the game, you get unlimited access to all versions. This unnecessarily pushes all other supporters into the background. That's why I don't plan on giving itch.io special treatment.