we have the same problem. On our Chinese website for the “interns” menu we want to add an icon to the menu, same as we have it for example for “Chinese courses” and the other menu options. In the Theme Documentation, it says we should enter the icon we want under “CSS classes (Optional)”, however this line does not show up at all when we go into editing menus in Wordpress.
@BenSheppard, how would contacting the author work? The link you posted does not lead to a contact from. Is it possible to get a reply here?