Sorry to say but your provided Login details are incorrect and we are unable to Login to your Site.
Regarding the other question, sorry to say but right now the BUY NOW button is only available to add on the Single Product page only. You can’t add it on Shop or Category pages.
Actually, it was a third party Plugin conflict on your Site. A plugin named “Variation Swatches for WooCommerce – Pro” is causing the conflict, when we deactivated that, the Theme Settings related to hiding the Swatches were working fine by then.
So, it is a third party Plugin conflict not a Theme end issue.