I don't know if I am alone in this, but my game is unable to update chapter 13, i think there is some glitch with it that needs fixing. I keep going to "find new updates", it constantly says it found a new update, starts the process of seemingly installing it, but when i start the game, it's still only chapter 12, even if I reinstall the entire game, chapter 13 still doesn't work. ( trying this from the itch app)
Edit: ok I made it work now by completely removing it, and installing it again manually, instead of going for the "reinstall" option in itch