Hello
If HDD Regenerator is working straight on the hard drive, it's a very bad idea. Data recovery software should recover data to a different hard drive. Standard exercise is to hook the failing disk up as a secondary disk on a working PC and recover files to the working disk.
What you are working with is, almost definitely, physical damage (gouges) to the heads and platters. You want to run the disk as little as possible and recover the most important data first.
If it was my disk, I'd stop the software, remove the hard drive, attach it to another PC, and run one of the many data recovery packages available that DON'T try to "repair" the disk.