Unable to uninstall Network Wide Menus

Firstly I maybe wrong - but thought this was your plugin - I don't see it on the dropdown so I picked a random choice here.Excuse me if I'm wrong...

The reason Im hunting this down is because I'm trouble shooting.

When place a menu item on the parent site of my multiste It shows up on other sites with the same theme.

Actually to be exact the parent has roots.io theme and the effected children have shoestrap which is a fork of roots

Anyone else observed this bizarre behaviour. It's a real problem for me.

I tried to delete via ftp but cant find this plugin
The plugin has no delete function in the dashboard - and yes it is deactivated so it should have a delete function

Thoughts ladies and gents?