Updating Firmware Using Cura
Step 1: Connect your printer to the computer or laptop using a USB cable (Port will be near to the power socket on the machine)
Step 2: go to machine settings
Step 3: Select the serial port where the printer is connected and click ok
Step 4: Again go to machine and select install custom firmware and select the downloaded firmware
Step 5: A pop of will appear, click Ok and the firmware will be flashed