Prerequisites:

macOS:
The following Rudix packages need to be installed - libusb (10.6 10.7 10.8 10.9 10.10 10.11 10.12) and dfu-programmer (10.6 10.7 10.8 10.9 10.10 10.11 10.12).
Please install the builds that match your macOS version (the packages built for 10.12 work fine on 10.13/10.14).

Windows:
Atmel FLIP 3.4.7 or newer needs to be installed. Please restart your system after the FLIP installation.

Update procedure:

Please make sure that only a single PunchLight USB device is connected when performing the firmware update.

Once the above requirements are met, please download the latest version of PunchLight USB utility.
Run the utility and open its 'About' window, then press the 'F' key on your keyboard.
A new 'Flash' button will appear near the bottom of the utility window.

After you click on the Flash button, the button will show the status of the firmware upgrade process. After the flash is done, the PunchLight device will reset itself and the PunchLight utility will restart to re-scan the attached devices automatically.
The firmware version reported by the PunchLight USB status should be changed to the latest firmware available for your unit.