I’ve just purchased the Ajax Search Pro plugin from you, in order to search a Woocommerce attribute (‘model number’). The dropdown search works fine and searches the correct items and returns the correct values, although if you then press enter, it goes through to the WordPress search which does not return the correct items.
E.G. Searching for: “A1593” should return an iPhone 6 Plus.
By default it redirects to the WordPress core results page, without override. You can change that to the WooCommerce results page with override, and that should solve the issue: http://i.imgur.com/0GPlee0.png