Disclaimer: This post is for educational purposes. Modifying firmware may violate your local laws or EULA. Use clone devices at your own risk.
We all know the feeling. You plug in your trusty (or cheap, Chinese clone) Delphi DS150E, fire up the software, and that little pop-up appears: “New firmware available.”
If you can’t recover it via the USB boot pins, the FTDI chip (or the STM32) might actually be fried. At that point, buy a new one—they cost less than a pizza these days.