The ESP tool "Flash Download Tools (ESP8266 & ESP32)" can be downloaded here.
The binary files used can be downloaded here.
(Right click>Save link as)
- Open the tool and select "ESP32 DownloadTool".
- Enter the binary files and their addresses, and configure the remaining settings as shown below, selecting the corresponding COM port.
- Place the SuperB into bootloader mode by holding down the BOOT button, pressing and releasing the RESET button, and then releasing the BOOT button.
- Press start to begin flashing. (~10sec)