So go to your library right click on the game and press mange or check for updates and download not the main page of the game
Viewing post in Knightly Passions [1.21 version] 18+ comments
At the time of the release of the new version of the game - it costs $10.
0.8a is out recently and will cost $10 for 1-2 weeks. You paid $5 - not for early access, but for getting a new version. You will receive it, but after a while (until April 15). Those who paid $10 get early access (the latest version of the game at the time of release).