New Post: How to change the Company Logo

I have composite C1 installed on a web hosting server and have been playing around with it in the HTML format, I am trying to change the starter site "Masterpage" (yes I know its not) header where it says "Company Logo" .

I figured it to be part of the menu navigation system but dont know which file to find it in and I cant seem to find any info about it on the composite web site

just wondered if anyone has any ideas?

Thanks