Hi,
Wasn’t possible, however, I’ve just added it to the plugin. If you update the plugin to the latest v1.2.0, you will find new “Order Items Table Options” settings section (in “WooCommerce > Settings > EAN”). This will affect all places where order items table is displayed, including emails (both admin and customer), “thank you” page (i.e. “order received” page), “view order” page (in “my account”)).
Please give it a try and let me know if there are any issues.