Installing this plugin did this for me:

It intalled the Custom Map Name plugin
It also installed a plugin called Map Name Changer
There was a config for Custom Map Name
There was not a config for Map Name Changer

Uninstalling the Custom Map Name plugin left that named plugin installed but did uninstall the one called Map Name Changer

Can anyone explaain to me what is going on with this ? It is too bad but I have uninstalled of this unless/until it gets sorted