Hi nemanja,
Thanks for the message, our plugin followed the wordpress standard API like this:
add_filter( 'wp_get_nav_menu_items', 'tooltipsmenucheck' , 10, 3 );
you can see we hook wordpress hook wp_get_nav_menu_items to add our tooltip in menu items. If your theme have some code which not follow wordpress menu standard API, our plugin will have no chance to add tooltips for menu items, in this case, you need check the theme codes which releated with the menu part, if you are not a coder, maybe you need hire a freelancer to check this part, if you want to hire me, please just tell me, please understand we have no way to support all themes menu item automatically, thanks, have a happy day. 🙂
Best Regards,
Tomas