Hey there! I'm not sure if I understand correctly: did you find out how to work it out for MS Pain and Paint.NET or do you want me to change something in the software? :)
I actually mispoke, MS Paint and Paint.NET accept images whose filenames are copied in the format CF_HDROP (not text):
https://devblogs.microsoft.com/oldnewthing/20140609-00/?p=783
Paint.NET is the main image editor I use, so your disclaimer piqued my interest. I had to find out how to get it to work 🙂