The solution to unlock the clock and reset it to running condition requires that it be totally powered down. Use the following procedures:
A. Remove the M1 cover (it may be easiest to remove the board from the box first).
B. Then slip a small piece of paper in between the coin cell battery (upper left corner) and the metal clip that holds it in.
C. Leave this paper in place and turn off the M1 power switch.
D. After 15 seconds, turn the power switch on and remove the paper.
E. This will unlock the clock and allow it to be set from the keypad or from the Elk-RP software.