Uninstall it. To turn it back on just hit install  

If you do not want shell enhancements to exist on your computer in any form what so ever you will need to uninstall it totally.

These are not third party softwares they are operating  system enhancements that need running processes exactly as the rest of an os does.

Just as with those other processes you can kill them directly...

If you don't want to ever see them you can at least uninstall, unlike most processes locked in by Microsoft's os itself.

Most if not all shell enhancements retain processes simply because they are requested originally by the user/installer.

If you cannot cope with non-existent loadings from shell enhancements even when disabled then uninstall all of them and accept the limitations of the default MS operating system.

I came across this heated discussion when I was looking for how to script or automate the setup for different configurations, such as dual monitor at home vs. dual monitor at work. Couldn't find that, but this discussion of exiting Deskscapes made me feel like I was missing something. I run Windows 10 and went into Settings -> Apps, clicked "Stardock Deskscapes" then on the drop-down menu "Uninstall". It asked me if I was sure, I clicked yes, and it uninstalled. Or it seemed to. There's no tray icon or process listed in Task Manager.

Is it still there hiding somewhere that I can't see?

Jack

It is, as bundled software. Even when you reject the installation of the iTop software which doesn't come close to Fences, it still installs. I informed Iobit of this behavior of their installer.