Under , click Choose File and select your 6.1.7 download. Click Upload and then Update once the file is verified. Pro-Tip: Recovery Mode UAP/USW Firmware 4.0.54.10625 - Ubiquiti Community
: Added integration with the Ubiquiti Network Management System (UNMS).
Reboot the radio before starting the flash process to clear the RAM. Upload Firmware: Go to the System tab.
: Detailed discussions on older airOS versions often appear on the Ubiquiti Community or local forums like Ubnt.su . How the Installation Works
If you are on a very new firmware (v6.3.0+), the device might block downgrading to 6.1.7 via the Web UI for security. In this case, you may need to use TFTP Recovery .
: This should reveal extended frequency options in the Frequency MHz dropdown menu. Ubiquiti Community