After complete your order with us at FileMass Official Reseller, please follow these instructions:
1. Login to your FileMass account https://filemass.net/login.html
Or create new account https://filemass.net/?op=registration
2. Go to My Account page https://filemass.net/?op=my_account
3. Look at Apply Premium Key field.
4. Put your FileMass Premium Key here, then Apply it.