Hey there.
I downloaded the most recent version of Tyranny today from GoG to install it on my laptop, which works just fine.
What does not work, however, is using my existing saves from my desktop PC, using the previous version of Tyranny, with this installation of Tyranny. The save files are in the correct folder (I started a new game and its save files appeared in the folder I used for the existing files). Are the old saves really incompatible with the latest version of the game?

Nevermind - the game can't even load the saves it created seconds ago. And just now I remember that Tyranny has a 6GB min system memory requirement - my laptop has 4GB. Can't be helped then, I guess.