Please note that I have made my own header image and installed it under LAYOUT > PAGE ELEMENTS. You can do this too - as long as the header image has a background colour of white (to be seamless!) and is 720 pixels wide. Height isn't as important as width, so it doesn't matter how high. This design will come with a plain text header by default.

Make sure that you select the following if you want to replace your header with an image:

This is what I did (thinking it would be easier than replacing the image path in the code as I have been instructing in my recent designs - the jury's out - I think I prefer the other way as it allows you to be more precise and specific).

'tis cute though!