How to restrict access to Shortcode Generator

If you want to disable Shortcode Generator for some "non technical" users, you can add next snippet to your theme's functions.php file

update_option( 'su_generator_access', 'administrator' );

administrator - is a minimal user role to access Shortcode Generator. You can replace it with editor or even any other user role you've created. Also, you can replace it with any user capability. See this Codex Page for more information.

If you want to remove this restriction just replace this snippet with next one

delete_option( 'su_generator_access' );