This is not a web app that I am currently having trouble with - it is a console app.
There are no missing decencies either - since the last version worked perfectly, just added a few lines of code, which BTW, I removed to see if that was the issue!
An old backup copy of the app was just tested, it runs perfectly and stays running.
I'm going to try compiling on a Linux machine to see if that has any effect, to move on I hope so, but if that cures it, what a PIA!
I'll try adding a raised event to make sure that the code in the unhandled exceptions gets run. Not sure if the remote debugger really works or not on Windows. I do not like using the Linux machine, it is cumbersome for me - 'cause I don't use it!