I picked up a set of these Quirky+GE Tripper window/door sensors.  I quickly added one with no issues.  I had some difficulty adding the second one.  I noticed that the LED wasn't lighting, so I swapped out the battery from the one that was working.  This seemed to get the second one working.  I then had to find a second battery to get both working at the same time.  In this process I mixed up which was which, so I decided to remove both from the Almond+ (batteries may have been out of the sensors).  Since doing so I cannot get the sensors to re-add to the Almond+.  I have tried the remove feature on the "add a sensor" screen with no luck.  As I have over 20 sensors and even more rules setup, I dread using the "remove all sensors" or doing a hard reset.  Any suggestions to get these working?