That wasn't really what I asked, but if I am comprehending you correctly, every time you update, you want people who have already paid for the adult version of the game to buy it again. Correct me if I am wrong.
If that is the case, I have to say it's absurd. I bought Talos Principle for $5.99 two weeks ago. I believe for the $10 I paid for the game, updates should be included, especially considering that we're basically alpha testing the product for you, and you're rolling out updates based on feedback from users.