Reply To: Image editting: how to change default setting?

I think it's the operating system that determines what program to use to open a file with by default. I don't know how you set it on Windows, but on a Mac you can right-click on a file in the Finder and choose 'Get info', and in the window that then appears you can choose the correct application from the drop-down menu. If you click 'Change All…' it will make all similar files open with that program by default, including when you choose 'Edit original' in InDesign.