We're using PayPal as payment gateway, just open the software with internet connected. You will be prompted to upgrade if your device is eligible.
Click on the "Pay by Paypal" button will open browser, you may enter your e-mail for notification. Complete the transaction at PayPal, and that's it.
Once the payment completed, you will be notified by e-mail and next time you open the software, you will have your device upgraded automatically.
Your box will still be black anyway, but you can access support download and all online services will also work afterward.