: After installation, open Handy Recovery 5.5.

: Go to the Help menu and select "Enter your serial number..." or click the registration button on the toolbar.

Wait, the user might not know technical terms, so maybe the user story should be clear. Also, technical specs like backend for serial generation, database storage, encryption, etc. Need to cover all aspects from both developer and end-user perspectives.

: Allows users to find deleted files by name or mask and displays a probability of successful recovery for each file.