It would be possible to grant access to this plugin somebody except admin just after editing this plugin files or contacting plugin author in order he change user permissions he use to protect this plugin menu.
This plugin uses ‘administrator’ role ID directly at the menu definition code instead of some user capability (4th parameter):
lass.CBRatingSystemAdmin.php:35: $ratingactiontop = add_menu_page(CB_RATINGSYSTEM_PLUGIN_NAME . ' Main', CB_RATINGSYSTEM_PLUGIN_NAME, 'administrator', 'rating', array('CBRatingSystemAdminDashboard', 'build_admin_dashboard'), plugins_url('images/admin_icon/rating-home-16.png', __FILE__));
class.CBRatingSystemAdmin.php:36: $ratingactionform = add_submenu_page('rating', __(CB_RATINGSYSTEM_PLUGIN_NAME . ' Main'), __('Rating Forms', 'cbratingsystem'), 'administrator', 'ratingform', array('CBRatingSystemAdmin', 'admin_ratingForm_listing_page'));
class.CBRatingSystemAdmin.php:37: $ratingactionformnew = add_submenu_page('rating', __(CB_RATINGSYSTEM_PLUGIN_NAME . ' Main'), __('Add New Form', 'cbratingsystem'), 'administrator', 'ratingformedit', array('CBRatingSystemAdmin', 'admin_ratingForm_listing_page_add'));
class.CBRatingSystemAdmin.php:39: $ratingactionuserlog = add_submenu_page('rating', __(CB_RATINGSYSTEM_PLUGIN_NAME . ' Main'), __('User Rating Logs', 'cbratingsystem'), 'administrator', 'rating_reports', array('CBRatingSystemAdmin', 'admin_rating_reports_page'));
class.CBRatingSystemAdmin.php:43: $ratingactionavglog = add_submenu_page('rating', __(CB_RATINGSYSTEM_PLUGIN_NAME . ' Main'), __('Rating Average', 'cbratingsystem'), 'administrator', 'rating_avg_reports', array('CBRatingSystemAdmin', 'admin_rating_average_reports_page'));
class.CBRatingSystemAdmin.php:48: $ratingactiontheme = add_submenu_page('rating', __(CB_RATINGSYSTEM_PLUGIN_NAME . ' Main'), __('Themes', 'cbratingsystem'), 'administrator', 'ratingform_theme', array('CBRatingSystemTheme', 'admin_ratingForm_theme_settings'));
class.CBRatingSystemAdmin.php:49: $ratingtool = add_submenu_page('rating', __(CB_RATINGSYSTEM_PLUGIN_NAME . ' Main'), __('Tools', 'cbratingsystem'), 'administrator', 'rating_tool', array('CBRatingSystemTool', 'admin_ratingForm_tool_settings'));