DFR0057_flash_uploader
If you want to update a new version of the firmware here is what you need to do
Select boot loader pins J13, position 1-2. It is not marked on the Diagram but its right on top of the micro controller.
to power the sdb boards, simply connect the ground wire from your supply to the screw terminal labeled “gnd”, and then connect the positive wire from your supply to the screw terminal labeled “+12v”. nOTE: DO NOT apply voltage over 15V DC.
the sdb board supports rs232/ttl interface. the rs232/ttl output mode is selected by jumpers. the flash loader tool should be configured with parity even, echo disabled and timeout 5. your COM port and the baud rate 115200 (check jumper selection is right )
after you have connected serial, applied power and configured the board you should be able to click next 
proceed and open the new window to select the new firmware version. 
shopping sensor/motor drive board - version 2.3 (sku:dfr0057)
category: Product Manual category: DFR Series category: Motor Controllers