Does not work

It says the button is supposed to show in the editor and its nowhere to be found. Ok, correction, it’s supposed to override the button so I found the button. However it does not work. Its is installed and activated. The button inserts the more tag like it always has but does nothing to info below the tag.

I’m not a coder but you are supposed to have to do nothing with this plug-in.. and there are no settings anywhere.