The upgrade should be done using a reliable computer. Do not disconnect the Condor until the upgrade has been completed. Also make sure no USB extenders or Hub are being used.
Step 1. Download archive
Connect the Condor to a PC (Windows OS) and download the “Upgrade.zip” attachment.
Step 2. Launch the application
Extract the attachment and run the “PhoenixFirmwareUpgrade.exe” application. Select the “Upgrade” button.
If the “Upgrade” button is disabled it simply means that no additional updates are currently available.