If you can’t get it to work then you could sign up for Premium Support if you liked, but the following should do the trick anyway:
[code:3sfi8n7q]<li><a href="#">About</a>
<ul>
<li><a href="#">About the company</a></li>
</ul>
</li>[/code:3sfi8n7q]
No files need edited. There is a custom code option in the admin page where you can insert your own HTML. I assumed that was what you were requesting assistance for or did I misunderstand?