Firmware can be found at http://c-scape.nl/bi-fury/

According to the website, the LED should not turn on when you short-circuit it. All of mine do, so I don't know how to upgrade them.

On the webpage, you have the option of choosing which temperature is too much to turn the chips off. Mine apparently turns off around 78 degrees, but that can be bfgminer.

Did you figure out the meaning of the lights? When it's red or green?