Please note, de-selecting brands from our app will not delete your products from your Shopify store. We have designed the app this way for your own safety so you don’t delete your entire store catalog by accident!
To bulk delete a brand all you need to do is go to products, select a vendor.
Then select the checkbox to select all products on the page, and if there are more than 50 products in a brand click "select all 50+products".
Then click more actions, and delete products. You will have to confirm that you want to delete all 50+ products, but this will only apply to the selected vendor.