The upgraded version works but the licensing process is garbage. You get a PayPal receipt that does not include any licensing info and that's followed by a sketchy one that will likely go to your spam folder. If you use outlook.com it will refuse to stay in your Inbox and eventually you'll empty your spam folder, forgetting about the email. You're going to need the email because the extension will downgrade itself to the free version and the only support the developer will offer is to give him another donation and try to save the email this time. Shame on me for trying to circumvent YouTube's usage restrictions, shame on the developer for a poor licensing process (I'll assume that the downgrade is accidental and not an attempt to milk donations).