I have a problem, not sure why but people have said they could open dds files for this game, however, I am having problems it gives an error they are DirectX11 I think or something witch may be the problem however that still does not help me with my mod with the steam game, could you play around with the file type and see if you can get it to load with Paint.net or if not add support for the type of DDS it would mean a great deal to me and many other people that would be looking for a free program to use to edit the file types.
Space Engineers DDS File Type.zip