I'm using debut on a demo store and when logged into Admin but viewing the website in a separate tab, for example - I see this bar. When I log out of Admin and navigate to my site again the bar is not there.
However, check the url in the browser. If you see https://yourdomain.com/?key=XXXXXXXXXX you will probably still see this bar. Try navigating to https://yourdomain.com <-- no parameters after the URL.
I think that should fix it.