Thank you so much Jason. Am amazed at your speed of replies and helpfulness. I've managed to install everything successfully and upgrade to the new firmware on my Flirc device.
Sorry to be annoying, I now have another question - the Back, Menu and Home buttons don't work on my Harmony 650 remote. I've gone into "MyHarmony" app and don't see the corresponding buttons to map onto my remote. The closest I could fine to those are "ContextMenu", "ParentFolder" and "Back", all of which, unfortunately do not work. Would you have any tips on setting up my Harmony remote device? I've used the instructions here.
EDIT: I think I figured out why. Although I see the new NVIDIA Shield Gen2 GUI, and Flirc prompts for a firmware update immediately upon opening Flirc, the firmware update doesn't seem to stick (ie. i think the device is not updating properly). After selecting yes, the firmware says it is successfully updated but the version number on the bottom right still reads 3.9 when it should be 3.10.