How to stop "NTFS new version", or any notification for that matter?
Any App you need to actually run an installer &amp; give admin perms, rather than just drag to Applications, installs elements somewhere inside the 'system' itself.

It is not wise to just throw these out if you no longer want them, as they will leave all the system bits behind.

As you threw away the component which contains the uninstaller, the app itself, then by far the simplest way to uninstall it will be to get the installer again, install it, then use its own uninstaller to uninstall it.
At the moment it is still entirely functional, you only threw out the control surface.