Make sure your dongle is connected to PC. then install & launch DC-Unlocker client software. Open "About tab" and press "Access support area" button
Wait for the Support area website to open in browser. Click on "Features" on top of the page
Select feature you want to activate from drop down menu list. After selection you will see how many credits you need to activate it and how many you currently have in your dongle account
After selection of the feature from drop down item list, press "Activate", now your dongle is activated for selected feature!