How to activate Filesmonster Premium Key:
1. You will receive a Filesmonster premium voucher like this: 6OIXXXASDDJSV35GT
2. You should be log in : https://filesmonster.com/login.php
( If you haven't account at Filesmonster, you just need to sign up: https://filesmonster.com/register.php )
3. Make sure you are logged in. Then access this link: https://filesmonster.com/redeem_coupon/
4. Put your voucher code in field "Premium Coupon Code", and click on "Submit"