The actual developer (Dmitry Primochenko) offers a on the official website. This trial is heavily limited:
HDD Regenerator is a specialized utility designed to detect and repair physical bad sectors on hard disk drives (HDDs). Unlike software that simply hides bad sectors by adding them to the G-list (Grown Defects List), HDD Regenerator claims to "regenerate" the magnetic surface of the disk. 1. Core Technology: Magnetic Reversal limited version hdd regenerator 11 link