1. You will receive a Premium key / Premium code like this: 1220s5e5cbo381XXXXX

2. Login to your Cloudhunger account (You should register your own account, if you dont have it, https://cloudhunger.com/register.html)

3. Go to My Account page (https://cloudhunger.com/?op=my_account).

4. Look at Apply Premium Key field.