I don't have the Control Panel installed, but I can see the IDevice.VersionNumber is 280 (not sure if that's the same thing). Also, in Device Manager, the driver for the D100 is version 6.1.7601.17514 (USBAUDIO.sys version win7sp1_rtm.101119-1850) .
Can you direct me to a download/install for Firmware version 118? D100 updates are not available via the "MyHeadset Updater".