conflict with featured image use in theme and woocommerce

Hi, I have the Catch Everest pro theme along with woocommerce, and since upgrading my version and being able to use a different header image on all pages, it is now messing up my shop. The problem is they both use featured image, so for my categories I have a 'preview' of one of the images in the category on the header, and this isn't what I want it to do :( I don't want a header image for the shop, just the categories. Can you please please tell me how to correct this? I've included an image so you can see what I mean. Many thanks