Extract mk11hook.zip to Binaries\Retail folder of Mortal Kombat 11. If you are not sure how to find your Mortal Kombat 11 folder, search for it in your Steam library then right click on the entry and select Manage->Browse local files. If installed correctly, a notification will appear informing that the plugin was installed and is ready to use. By default **F1** will open or close in-game menu.