I just went to install the new OS to my A4 MKII and found that the USB-MIDI ONLY Checkbox under the System menu won’t uncheck. I press “yes” and no change. All arrow keys, no change. I press “no” and it backs out of the menu.
I’m now doing the update over MIDI but I’m wondering if anyone else has had this happen. Perhaps the new OS will fix this problem. If so I will report back.