Hi,
Thanks for the access.
You want to create a menu items structure which corresponds to your categories via the Joomla menu manager (I've done it for you for the "TILBUD" and "Re-board Letvægtsplader" categories).
Then, you can turn off the "simplified breadcrumbs" setting of the HikaShop configuration to remove the "category_pathway" parameter in the URLs of your products as it is not needed for what yo'ure trying to do.
You'll end up with a nice URL like this:
shop/tilbud/re-board-letvægtsplader/product/re-board-basic-hvid-16-mm-2400x1600-mm
and the breadcrumbs will display properly.
You can even empty the product SEF name setting of your HikaShop configuration in order to get this URL:
shop/tilbud/re-board-letvægtsplader/re-board-basic-hvid-16-mm-2400x1600-mm