refers to a specific build of the "Xbox 360 Controller Emulator," a widely used open-source utility that allows gamers to use third-party controllers (such as Logitech, Saitek, or generic DirectInput devices) in games that only support official Xbox 360 controllers. This version acts as a wrapper, translating input signals from non-Xbox hardware into the XInput format required by modern Windows games.
Move the x360ce.exe file into the same folder as your game's main executable (where the .exe lives).
Once the buttons are mapped (you can see them light up on the UI), hit Save and launch your game. Why use this version?