add external link to menu – devine theme

Hi,

Hope you can help me!

I would like to add an external link to my menu, but I just found out that the regular WordPress menu settings are not working for the devine theme.

How can I add an extra menu-button which is linking to an external url?

The site is: http://www.5square.nl/ and next to contact I would like to add an extra button.

Many thanks!
Wietske