Look for the Key icon or the Activation button in the top menu.

Software cannot validate key online. Solution:

The search for a usually stems from the frustration of having corrupted files you can’t wait to fix. However, there are a few things you should know before looking for a "crack" or a free key online. 1. The Risks of "Free" Keys

to save your repaired images and unlock full functionality, you must obtain a valid activation key Stellar Data Recovery How to Get a Genuine Activation Key