Hi, Laurie, and thanks.
BTW, UDP settings are clicked in WSJT-X, in case you may think that as the problem.
It works in v2.16.4 but not in 2.50.0.
Clicking on the View menu brings it up but clicking on the stars for F3, F5, F11 and F12 does not work, nor does pressing the function keys.
The others work.
I have removed Desktop Runtime 5.07 and replaced it with v5.06.
Any and all assistance greatly appreciated.