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On PC, the only steps are to extract the game into a fresh folder, and start up the game :) Unzipping the 0.5.9 into the 0.4.91 version does not work, it needs to be extracted into a fresh folder. If the game starts, it will create a few .txt files that indicate what goes wrong. If you don’t have those files, I would recommend checking Windows updates, the graphics drivers and so on. If your game path contains unicode characters, it can lead to issues as well on Windows 10 for example :)