Below the Update button, the progress bar shows the completion percentage of the firmware update in progress. Once complete, a success or failure message appears to indicate the outcome of the update. On the device, the LEDs flash red to indicate success. The device then automatically reboots and beeps.
To confirm that the firmware update is complete, check the firmware version on the device in the Device Information section of the Web HMI dashboard.
A factory reset may is highly recommended to clear out old XML and zjob files and replace them with newer files. This is necessary for GS20 and other leader devices such as the FS40 with a Gateway license upgrade.