Extract the Firmware file from the ZIP (the firmware file is a .img file)
Copy & paste the extracted file to the root directory on the SD card ( please use SD card with FAT16 or FAT32 file system).
Insert the SD card into the PicoPix and then power it on.
Go to Main Menu/Setting/Maintenance/Firmware Update, follow the instruction to start update process.
Wait for the progress bar until it reaches 100%. Then follow the instructions.
Important: Do not unplug the power adapter during the firmware update.