That's a plugin that needs to be activated. They may have forgotten or it's not compatible with the upgraded version of vB. It may need to be upgraded also but if that's the case then that's something the programer who wrote the plugin needs to do. Once it;s updated admin can update it here. Or it's been replaced with the FB like button.
To request a list and order you must have at least 20 posts and be in the GREEN with rep points.