You may download Windows version from here en.stm32cubeprg-win64_v2.9.0.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.
- Select USB
- USB1 and click Refresh
- select “Erasing & Programming”
- Click “Full chip erase”
- Browse the hex or bin file from your computer, if flashing ardupilot, use “ardu*_with_bl.hex“.
- Click “Start Programming”
- After programming, unplug USB and plug USB back in. FC will boot and run in normal COM mode.