We're a system builder in Ontario, Canada and we've been deploying Paint.NET to all our new systems for years, so there's thousands of computers out there with Paint.NET on their desktop.
However for business use I have a need to efficiently send .jpg files to various people and I often forget to change the file type so I have to reload the file, re-save the file, etc. and strangely, I can't seem to find the preferences menu to change this option. Can anyone direct me where the default save-as file type can be changed to .jpg?