Send an Email to EmfDev requesting the firmware update with the units serial number. You can E-Mail him in this support forum by going to his profile and clicking the link "Send an E-mail" when he replies to you with an E-mail having the update link you will then have his E-mail for future requests. Bob
“If you want to find the secrets of the universe, think in terms of energy, frequency and vibration.” Nikola Tesla
Would be nice if there was an overview of all the models and the latest firmware versions. I'd last updated my 320 Plus v4 a couple of years ago so I had no idea if I was using the latest firmware. If I'd known what the latest revision was I wouldn't have emailed them, only to get a reply I'm already running the latest firmware. It's a waste of their time.