Thank you for your reply! However, I would prefer not to have to assign/change the default for dds files. I don't believe there has to be a default for dds files in Windows 11. If I have to assign a default, I'll probably use GIMP. My question is how to install paint.net without paint.net assigning itself as the default for dds files so that I don't have to change/unassign the dds default after installing it. I use paint.net and GIMP. I appreciate any assistance!