Hi davemitt,
Remove the processor card from the carrier, open the clamshell case by poping the small plastic tabs back gently with a small flat blade screwdriver. Once the cover is apart and you can see the PCB, look for the battery. It looks like the type used on old computers, 3.6V Nicad with three legs. There is a small hook and spring lever, seperate them. At this point, if the card is over five years past it's last battery change, you may want to change the battery. Reconnect the lever / hook and reassemble the processor card. Reinstal the card in the carrier and start programming, it's been defaulted.
-Chris