Yes, for me too. I think I understand now. FEYADA (thanks!!) changed the minimum of 10 dollars to 5. Because we bought 4a during a sale, we payed 5 dollars. So the 4b never worked because it needed 10 dollars minimum. Itch.io should understand this and allow us to download the 10 dollar version if we bought it during a sale...
So i am scared that the next update we are going to have the same problem...