Sign into your Steam account now, we use your Steam ID for authentication. You will need this even if you use other ways to launch your games.
Make sure your games are closed.
Download CxLoader here.
Run the file as Administrator. Always use this to open the loader.
In the loader, click Register and create an account.
Enter the following as registration key: fYyhDa7VHQ
Once registered, you will be prompted to link a Steam ID - make sure you link the one you plan to use.
Click on Redeem and input the key you received after purchasing the product.
Click on Update available. As soon as the update is done, click on the product icon you intend to use.
Your game should start automatically.
Configure shaders by invoking the overlay. Usually by pressing the F10 key (unless otherwise specified). Some products may have alternative keybinds, so check their guides.