I checked the latest version on available for download it is v1.65 (may be it is old image only) on http://themeforest.net/downloads.

I downloaded it and yes the issue resolved for three files of these four files but the zip file still missing the below file:

atelier/woocommerce/single-product/add-to-cart/variable.php version 2.3.0 is out of date. The core version is 2.4.0,