Please follow the steps below in order to update the firmware when necessary:
1. Run the executable from the extracted folder
2. Connect the USB cable to your PC
3. Press the F1 and F4 simultaneusly on the device then connect the other side of the USB cable to the device
4. The FW update applications Load firmware button should now be enabled
5. Click the Load firmware and select the hex file near the executable
6. Click Write firmware and wait until is finished
7. Disconnect the cables
If everything was OK your device should be loaded with the latest firmware.