missing file/folders in Blix theme download?

A while back I had downloaded the Blix theme (maybe 6 months ago) and there was a folder in the images folder called spring_flavour and within that held the bg_header.jpg and other files. I just today re-downloaded the Blix theme and uploaded it to use, but it seems like something is missing – no image files and no folder called spring_flavour. The reason I need it is because I want to change/add an image to the header so it’s not plain. Anyone have any clues on what I need to do? Can I use the old download of Blix or were there problems with it?