This build adds a few additional verbose logging messages around the device discovery.
After installing, and restarting, you need to go to the Settings->About page, hold Ctrl key, then click the Verbose Logging button that appears. Then head to the Devices page and hit Rescan. Then post the new logs.
Martin-
I could not apply your suggested filter as an input filter. Wireshark rejects it. Wireshark did allow the filter as a display filter. The only input filter i used was udp.
Should I try something else?
sub- That step didn't occur to me. Is that a setting in config.xml?
I might need to give you a new build with a tweak to that logging, so we can see the address it sent to. We can see it tried to send the UDP discovery though, skipping a few non-Ethernet network devices, but sending to one.