1.) First, download the latest Clarity software from the Clarity download page, available here:
http://www.cyanogen.com/cloud_dl.php
2.) Once you have installed the latest version of the Clarity software that is compatible with your Boltwood Cloud Sensor, power on your cloud sensor, and start the Clarity software.
3.) Click the "Setup" button in the Clarity II software.
4.) On the "Clarity II Setup" window, click the "Get Firmware File" button. Then browse to the location of the cloud sensor firmware file called "cs2.hex". The firmware file is located in the Clarity II Program Files folder here:
C:\Program Files\Boltwood Systems\Clarity II
5.) Click the "Load Firmware" button, and follow the onscreen prompts.