https://www.st.com/en/development-tools/stm32cubeprog.html

You may download Windows version from here  en.stm32cubeprog_v2-3-0.zip

————————————————————————————————-

Make sure DFU driver has been installed. Check out “Install DFU Drivers” in this page

Connect the FC USB to computer while holding the boot button in.

  1. Select USB
  2. USB1 and click Refresh
  3. Connect
  4. select “Erasing & Programming”
  5. Browse the hex or bin file from your computer
  6. Click “Start Programming”

After flashing, unplug USB and plug USB back in. FC will run in COM mode.