Do you know where that option is in the app? I always just figured the App simply wasn't integrated with Mega, and you have to manually keep games hosted on Mega up to date. (Which is a hassle)
Oh wait, you where talking about the itch app, sorry, I thought you were talking about the android app.
The problem is that I had to upload the game on mega due to its filesize getting too big for itch :(
