Really love your plugin, but there is something quite essential missing: the possibility for the website admin to get a copy of the invoice. This is necessary voor accounting, so we can put the order and invoice in the books. Now the only way for me to get a copy is to temporarily change the customer's e-mail address to my own and re-send the invoice, then change back the e-mail address to the original one. It works, but it is not suitable as a standard procedure :-)
I will gladly rate this plugin 5 stars if this missing bit will be added!
It would be extra nice to have an extra button in the Woocommerce Orders page, to simply download the PDF. Even nicer if the same button would be available in the customer's account page, so they can re-download the PDF if they need to.