How to integrate Upfront with Ubermenu

Hi,

I want to use Ubermenu to customize the menús of the them "Scribe Theme". I installed the Ubermenu plugin but it does not work properly. I read the "manual integration" of the developer (http://sevenspark.com/docs/ubermenu-3/integration/manual) but I am not sure wich files I have to edit and I'm afraid to break something in the Upfront functions.

Thanks in advance.
Marcel Odena