In case anyone's interested, my PC, which is ex Windows 7 upgraded to Windows 10 without any problems (I didn't need to change anything at all), suffered the big update last night and on restarting this morning, RadarBox didn't work.
I changed the compatibilty to Windows 7, no joy.
I updated the RadarBox drivers to the Win 8 version, no joy.
I disabled driver signing, no joy.
I uninstalled the RadarBox drivers, then restored the Windows 7 drivers, restarted (disabling drver signing again), then RadarBox worked fine.
Hope that helps some folk.