Did you edit a line or add one in /almond/config/manufacturer_specifc.xml?
Other than that, all I can think of that would break things is, in the file with your connected sensors, editing the wrong sensor.
I haven't tried it yet, but seems that if the correct ID is in /almond/config/manufacturer_specifc.xml you could remove the sensor from the almond, start the reconnect process on the thermostat, and add it back and the almond would detect the device correctly from the start.