I paid for this game 3 years ago back when you were charging 5.50 USD... now apparently you raised the price, which for some reason, has stripped me of my paid access, meaning I can only download the "Free" version of the game.
I hope you'll consider rectifying this, as I love the game but I'm not purchasing it again especially because of a price increase.
Reading up more on this: it's because you have your project set to "free"/"name your own price", which means the paid files are considered an 'unlock tier' rather than purchasing access to the project as a whole - meaning anyone who purchases the game now will lose access if you raise the price again.
You can read more about it here, where another author had a user with this same problem on their project.