At level1 MikroTik console I can see:

UPGRADE NOW FOR FULL SUPPORT
----------------------------
FULL SUPPORT benefits:
- receive technical support
- one year feature support
- free software upgrades
(avoid re-installation and re-configuring your router)
To upgrade, register your license "software ID"
on our account server http://www.mikrotik.com

Where register that "software ID"? I can't see that opion after login to my MikroTik account.