The short answer is Iboysoft is a commercial product. The company does not give away unlimited, lifetime, or full-version license keys for free.
iBoysoft offers a of its software that allows you to recover a limited amount of data without a license key. Iboysoft Data Recovery Free License Key
Searching for "cracked" or "free" license keys on forums or document-sharing sites like Scribd or Google Drive carries significant risks: The short answer is Iboysoft is a commercial product