Hiding WordPress Logo and Menu Options

This plugin works really well except for one little point. I cannot hide the WordPress.org, Documentation, Support and Feedback menu options which are under the WordPress logo on the top left hand side. I have deactivated all of these in the ‘About WordPress Group’ which is inside ‘Admin Bar Back End Options’ but they are still visible.

Can you please advise how I can hide the WordPress logo and all the menu options beneath that logo.

Thanks