1. Connect to your Pip-Boy via the USB-C cable
2. Using a paperclip, press the hidden reset button on the back of the Pip-Boy (under the padded cuff, next to the battery door screw)
3. Whilst holding the reset button, press and hold the buttons above and below the screen (the "flashlight" button and the power button)
4. Release the reset button, but keep holding the other two buttons for a couple more seconds. The screen should remain blank.
5. Click the "Connect" button below and select "STM32 BOOTLOADER" in the pop-up dialog