On the current Eff+ theme it shows up if the plugin is enabeld. I just tried that. Other themes have an extra option (The Zenpage theme for example) for the link to appear or not since you can use it on a Zenpage page's codeblock as well.
I am not that familiarwith the Eff+ theme and since it has several personalities one of theme might be missing the link in the footer. I don't remember right now. Maybe you can try them all? Also look at your server error log in case it is that somewhere.