Really nice program, used it to test connection between RB and PC, have an usb-extender in use (5 mtr.); tested yesterday with a usb2tcp interface.
Where range (Polar Diagram) was the same with both options, I did receive more messages with the usb-extender; must admit usb2tcp was in disadvantage in this test, signal had to go through 3 routers, that's maybe too much ;)
Test it later with direct connection to extra networkcard in the PC which runs RB.
This screenshot is from lateron (19/10 1200 - this morning):