Now, head on over to your favorite Roblox game and press the Play button to run it. Do not close the tool as you cannot unlock FPS of Roblox games without it. Then, it will minimize to the system tray. A small terminal window will open up and the tool will be installed. Double-click on the downloaded rbxfpsunlocker tool and grant it the necessary permissions to run it. Now that you have downloaded the tool and the Roblox Windows client, follow the steps below to learn how to install and use the Roblox FPS Unlocker tool.1.