I have a very little question THE7 Theme

Hi to the entire community. My Name is Mariano, I´m from Peru. Yesterday I buy The7 Theme (is excellent¡) and I load this in my webpage (www.secomin.com)

I don´t know how or where i change the image in my home page, i search in te entire Knowledge Base, and i don´t find the answer.

Can you help me?

¨PD. My english is very poor. If you speack spanish it would be much better