Vertex Theme

Hi!

Im currently working on a new website for a friend of mine. I just ran into some kind of a problem. The theme is from Elegant Themes. I uploaded the logo and it shows up on the front page and the top left corner of the nav menu on all of the pages except for the homepage.

Im trying the whole day to change that stupid small logo to just text or something but I cant get it working. Who can help me.

Greets Hindrik