ok, i use win7 here.
just turning the nano nva with c usb lead connected i see thus in device manager
this shows device as teensy.
on entering dfu mode under 0.4.3
i get stm message in usb devices!
i now if i load Dfuse demo i get the device in the top window filled.
i did once convert a hex file to dfu, and for some reason it failed...
i just ended up with white display, so turned off nanovna , did the link and re inserted firmware.
everything was then back to normal.
don't know if any of this will help...
