More about RegClean Pro
The latest version of RegClean Pro v6.21 and the size of this installation package is 4.41 MB. This trial edition is created by Systweak Inc. Belonging to the System Utilities category, specifically System Optimizers, makes it popular among such programs. The software versions that users choose running on Windows XP/Vista/7/8/8.1/10 are 6.2 and 6.1. The most popular installers for this program are RegCleanPro.exe and R5JVGSD.exe. Suspicious elements were found in this direct download link by different antivirus systems, this usually means that the installer carries adware files that you can decline to install.

Actually it's the other way round, Regcleanpro is the originator, Perfectregistry is a knock-off.
Regcleanpro is the bad Indian alternative to the great American lookalike called Perfectregistry.