I have tried your plugin, and the attributes do not populate. I need a refund.
I am using Woocommerce 3.0.0 and Wordpress 4.8, both of which should be compatible.
Sorry its not working for you. You can request a refund here:http://themeforest.net/refund_requests/new
Matt M - Union Theme Co - SupportSupport Hours: M-F 10AM - 5PM PST (Vancouver)