You can find the steps you need to use it here in the main topic..
Or here in the LINK >> Here..
In the step 5 you'll find these:
5. After you successfully logged in, it will require a "Code - Key" for access to the hack menu(YCS).
Key can be required by purchasing a code key, you have to click on the button of "1 week" or "1 month" code key and then i will send the key to your paypal email or you can send me a email at yizhengchn@gmail.com for confirmation.
Then a screen showing where you can purchase it!!
XD