About This File
This is the launcher from the Steam version of Giana Sisters: Twisted Dreams. It includes a configuration tool that enables setting some options that are not available in-game.
The Amazon Prime Gaming version of the game does not include it, but this launcher can still be used to fully configure the game.
Extract the launcher directory from this archive to <path-to-game>\, then run <path-to-game>\launcher\GSLauncher.exe. Click the SETTINGS button in the launcher's main menu to run the configuration tool.