Windows Media Center
After going through the Pre-Requisites outlined above. Launch and sign in to the Logitech My Harmony software.
Head to the Devices Menu and click on the button "Add device" button as shown below.
Under manufacturer, type in Flirc. Suggestions will shown as you type, and 'Flirc' should be seen there. Typing Flirc out, or selecting Flirc are both sufficient.
Under Device Model Number, type in: kodi
XBMC is an alias of kodi, and will also work. The results are identical.
That's it. You're done. Plug flirc into your anything that's running windows media center, just make sure you are running Flirc Firmware >= v4.1.0
Flirc comes pre-configured with the logitech harmony profiles enabled, and will work without any additional software requirements.