Firmware Upgrade for Comfort II Ultra. Require  UCM/USB, UCM/Ethernet   with Comfigurator to perform upgrade
To upgrade firmware for Comfort and other modules, please read instructions at 
http://www.comfortforums.com/forum92/3400.html
The firmware files in this section may consist of older versions, or beta firmware. Do not upgrade directly to the firmware found here unless you wish to downgrade to an older version or you wish to test beta firmware

Click on Downloadable Files Tab to download the firmware file
See Firmware Change History at http://comfortforums.com/forum79/