Although RegistryBooster can be downloaded from a FAQ page provided by the developers in the Support section, there is no mention about the supported platforms and general compatibility.
As you can see in the image below, you can install it on Windows 10, but if I were you I would be extra careful with Uniblue applications. They are known to scam users to fix their problems.
However, if you still want to use the application, download it from the following page.
