I still maintain that the utility is risky for the average user.
It is a cold hard fact that many people do not READ fully the use guidelines before running the program
It may not have an included registry cleaner option at its initial download but it most certainly includes a number of add-ons ONE of which is a registry cleaner
More to the point the site warns in the following regarding these add-ons
System Ninja has a small number of plugins available that extend its functionality. Microsoft .NET developers can create custom utilities for System Ninja, allowing them to leverage the power of the System Ninja API
Registry Cleaner
A lightweight tool that can detect and remove unnecessary registry keys.
While we will make every effort to fix issues identified with System Ninja’s plugins, please note that they are considered to be unsupported and used at your own risk. Several have been developed by programmers not associated with SingularLabs and we cannot provide warranty on their work.
What I cannot find despite an extensive search is any guidelines - readily available on how to use the software OR indeed any advice on - establishing a means of returning to as was, if something goes wrong after running Ninja.
AND as far as I can see - if a problem does arise support is offered only in the forum of Singular Labs. (Gowland Media)
I most certainly would NOT recommend to anyone on this site the use of software provided by any company that includes in its software the provided plugins - for which they accept no responsibility and do not even produce them.
That said I have not tried the program and have no intention of doing so, but I would urge caution against its use - most especially on 10.
If anyone reading the topic decides to give Ninja a try, then like any other cleaning utility you would be well advised to establish a restore point before running Ninja.