locked main window immediately closes (v 2.50.2)


Ken
 

I upgraded to 2.50.2 with the latest Dotnet version. The install tells me that the latest version is installed successfully. When i open it everything comes up but then the main window immediatly closes and only the call sign window stays open. What did i miss or mess up? attached error pops too. Problem is the window does stay open for me to try to fix it..
Thanks

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