Or do this
http://forum.flirc.tv/index.php?/topic/1167-flirc-will-not-upgrade-firmware/?hl=libusb#entry7311
https://flirc.zendesk.com/hc/en-us/articles/200712548-Using-the-ZADIG-Utility
On the top right of the remote there is a keyboard button labelled 'KB' which gave me hope but I will be ordering Flirc anyway since it's such a great device.