You can remove order. Click "Webshop" tab, then click order id. In next view you can remove it by clicking "Remove" button. Unfortunately you can't edit edit/update order/customer info with new information. You can write an extension which will update customer data. You can re-use code from kernel/shop/userregister.php.
Removing an order does not work for me. When I click remove it posts back to the list of orders without removing it. Is there any other way to delete orders? Running on 3.8.0 btw.
In 3.8.x remove functionality was replaced with archive. However according to PHP code it should be possible to remove the order (backward compatibility). I think bug is in the template design/admin/templates/shop/orderview.tpl