Problems with displaying top menu

I am currently using the theme BirdSITE 1.02 on my wordpress website and this theme should allow me to place a top menu under my header. The problem is that even though i can customize it the way I want in the editor, it wont show on the website. I’ve tried to see if i am missing any “display on blog” checkboxes or something like that, but i can’t seem to find anything.

Is there anyone here who has experienced problems like this who can help me?

I’m kind of stuck. Help is apreciated a lot since i really need this menu for my website to work properly.