Apologies, I think the way I formatted the post's text made it difficult to see the command line code underneath 'Run write_flash command:'
You are correct. qio is documented there, but it did not work for this particular board.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
It appears to me that the qio is documented here already?
http://www.espruino.com/ESP8266_Flashing
Perhaps the initial page on the esp8266 docs could contain flashing info?