Go ahead and update the firmware. You will have to do it eventually anyway. I expect the reboot will reset the address to 1 regardless of the current address. I have not actually tried with any ID but 1 this so I could be wrong.
The procedure is to put the new address in the box. Click the assign button. you see the box counting down & the jag light blinking. Press the user button within the 5 seconds. Sorry for being redundant. Should work. Look at the top of the BCD Comm box for the current board ID NOT the assign box.
You can find directions for BCD-COMM
here