#1259
Vladimir
Keymaster

This plugin adds its own menu with empty capability (3rd parameter):

// define the plugin admin menu pages
    add_menu_page(
            self::$plugin_title,
            self::$plugin_title, 
            '', 
            self::PLUGIN_NAME, array(__CLASS__, 'include_admin_file')
    );

This is the reason why Admin menu add-on does not show “Participants Database” menu item. I will try to fix this compatibility issue.

Alternative way to manage access to the “Participants Database” plugin is to use its own drop-down menus to select roles for 2 levels of access to it: admin and records editing.