product_sort_price

-- url of the page with the problem -- : hetcomputerwinkeltje.nl
-- HikaShop version -- : 3.1.1
-- Joomla version -- : 3.7.3
-- PHP version -- : 5.6.31
-- Browser(s) name and version -- : Chrome
-- Error-message(debug-mod must be tuned on) -- : None

I'm trying to find the way to get my categories to sort in price descending. So highest price on top.
I can find it for 1 categorie, and it says that it's the default.
I just can't seem to find where to set this default. In the general settings I can only choose the 'product_sort_price' but not in what direction.