locked JTAlert 2.50.2 About doesn't appear, no comm from WSJT-X

Gary N6DM

I've been trying to get WSJT-X (2.4.0) to send decodes to JTAlert (2.50.2) on my Win10 box but no success.  I tried reinstalling JTAlert, but same result.  I've followed all the instructions in the JTAlert Help under WSJT-X UDP Setup without success.  And at the end of the Setup it says to open the JTAlert About window but the About window never appears.  What have I missed?  

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