It says that I have to buy the game again to try the updated version. Seems like itch.io default setting is to make people pay for every update.
Viewing post in update to Version 0.9.7.2! comments
Thank you for the offer, but I found a way to download without buying again. If I'm on the itch io page, I have to buy again, but if I'm in My Library/Things you own, I have a download button for the latest version, the itch io page is just misleading...it should change if I already bought the product.