I have had problems with the Decode window in the past.
I have the proper .NET framework and JT-Alert 2.50.6 running,
Laurie has included a handy test program to check your .NET setup.
Both of these are x64 versions.
I found that I have to go to the Decode Window's "settings" > "startup options" >
"delete all records".
I run 10m decode for 24 hours at a time and this data
must have filled some maximum record count (2000 ?).
When these are deleted on startup, it works nicely.
Decode window with custom layouts is yet another great addition to JT-Alert.
73 Kurt K1SEA