I'm really sorry, I'm not exactly sure what you mean by everything being free before, because I've always charged for the new updates. Regardless, I had to change the game's pricing around because I made a huge mistake years ago when I originally set everything up. I was charging people full price for updates, regardless of their previous purchases. I didn't realize I had made such a big mistake until some people here pointed it out.
Previous chapters are still free to download (as "demos") but now, if someone has bought the game once, they should get all current and future updates for free. It should make things better for everyone in the long run, but again, I'm sorry if this made things difficult for you, and I promise this wasn't done for any other reason but to fix my mistake!