I wonder I've you've made any progress on this issue, because I run into the same or a similar problem. I've installed the SW/driver (I've tried 1.2.6 and 1.2.7), then plugged-in FLIRC. Everything seems fine - all devices are there in the control panel (see images attatched):
However the SW won't connect to the device.
The system is based on an MSI Z77A-G45 mainboard (2 x Intel 7 Series/C216 USB 2 controllers + Intel USB 3.0 eXtensible USB controller), running Win7 x64.
I've tried everything I found in the forums (ran SW as administrator, updated USB controller drivers, checked USB devices using zadig (everything seems just fine), killed my security suite, ran the 1.2.5 debug SW (log attatched to this post flirc_session.txt)).
Tried to run FLIRC on the workstation at the office (Dell Precision T3610 with Renesas USB controller) - connects immediately.
Some input would be appreciated.