Extend Or Upgrade Your License Key
What's License key extension?
It means that you'll use the same plan/edition and receive new software versions for another year.
What's License key upgrade?
It means that you'll upgrade your plan/edition to a more advanced plan/edition and receive new software versions for another year. Example: Upgrade from "Basic Edition" to "Professional Edition".
You can always use/activate your existing license key along with the old software versions you downloaded and kept during your 1-year "free upgrade period". You extend or upgrade because you want more.