How do I uninstall the System Menu?

[RaydenX]

Hi guys,
I have one llitle question for you.
I've installed the very latest version of the system menu in Dolphin (418P) but it doesn't work. Therefore, I'd like to remove it and try with an older version but I can't find an option to uninstall the system menu.

Can somebody please explain how to uninstall a previously installed system menu?

Thanks a bunch