I thought anyone who got the full game through Itch (i.e. was a patron at the time of the 1.4 release and downloaded it linking itch and Patreon) can download the 1.5 update for free, though. That's why it's weird its taking so long, there should be people who shared it before who qualify. I guess they just moved on from the game and don't know/don't care there's an update.