The easiest way to factory reset the shade at any time is by using the pull cord. Pull the cord three times and hold until the green light stops blinking. Release the cord and the shade will restart and reset all settings to the factory defaults.
You can also factory reset the shade using the wifi control page. After setting up the shade on your wifi network, visit the control page at <your_shade_name>.local/ and open the configuration panel. Press the reset button to factory reset your shade. After a few moments, the shade will restart with all settings set to the factory defaults.