I got this info from member Daddio when I was at SSR and in the same boat you currently are in. It works!
The thermostat has two buttons on the left (ON/OFF and AUTO/FAN) and two buttons on the right (UP and DOWN)
1) Press the ON/OFF and AUTO/FAN buttons together. The digital display will change to 'CA'.
2) Press the ON/OFF and DOWN button together. The digital display will change to 'OR" (or something similar).
You have just deactivated the motion sensor. This will last for three days at which point you will have to repeat the process.