I am having the same issue as Nodeity. I tried using the ZADIG utility as suggested but there is no flirc device listed. It instead shows as bootldr.
I had to load the flirc software for the device to show up as flirc but now it shows 2 flirc devices (interface 0 & interface 1)
I just selected flirc (Interface 1) and reisntalled the driver. Reopened the Flirc software and cleared my configuration. Now it seems that I am able to program the buttons. Hopefully it will work now.
Yep that did it! Works great now.