Sometimes I go to use them and there's the green update arrow next to one of them, sometimes there's a popup asking if I want to apply the update now (but unfortunately it doesn't say which specific device it's for, so I usually choose Not Now and then check back to see which device has the green arrow), sometimes they have updated themselves automatically.Maybe you happened to click it at exactly the right time. I never leave my Amp on so I don't know what happens if an update becomes available when the device is active. Does it announce itself without any manual check?