[WooCommerce] Change admin date format

Hi,

I would like to change the WooCommerce date format from Y/m/d to d/m/Y. I have the Print invoice plug-in, and the dates are in the y/m/d format as taken from the date ordered in WooCommerce.

The below used to be a solution- but it no longer works for WP 4.0

http://www.remicorson.com/customize-woocommerce-admin-orders-date-format/

Can anyone advise me here?