What is it? NetControl is a program for people acting as the net control station on an amateur radio rag-chew net, specifically the Rooster Net (3990kHz, 0600 Eastern). You could use it for nets other than the Roosters, of course, as long as you don't mind your members' numbers being called Rooster Numbers and the date they joined your net as their Crow-in Date.
NetControl 5.5 is a complete rewrite done in C# using Visual Studio 2013 on Windows 8.1. It will install, and should run, on earlier versions of Windows starting with Windows XP SP3. Nothing is guaranteed. However, I will make a best effort to help you with these earlier versions of Windows.
You can install this alongside NetControl 5.0. There is no conflict between the two versions. You must have Administrator privileges to do the install.
Some of the changes include:
Installation should go something like this: