toe_head2001, opening the image file using the "Run" option opens the file only once. No problem there.
Pixey, "File Manager" is the technical and universal name given to all programs in all operating systems which are designed to help you handle all your files (copy, move, delete, rename, find, open, etc). In the Mac OX the built-in file manager is called "FINDER" and in Windows it is called "File Explorer". In Linux the file manager is called by different names depending on the distro (version of Linux), for example: Dolphin, Krusader, Nemo, Thunar, Caja, Konqueror, PcManFM, XFE, etc. By the way, for Windows there are far more advanced file managers than File Explorer, such as: DirectoryOpus, SpeedCommander, Total Commander, Free Commander XE, etc. Don't worry, I understand that not everyone knows these terms. Don't worry. I've been around computers since the day they came out to the market, and I am also a computer programmer. Maybe I'm a computer nerd after all.
The strange thing is that this is only happening with this particular program, Paint.net. I have several other photo editing programs and they all behave normally.
I am researching (trying to find) a "Context Menu" editor app that can actually open ALL the setting for the right-click that Windows has. As you know, there are two main advance places where all Windows settings can be found: GPEDIT.MSC and the Windows REGISTRY. I am well verse with both, but I don't want to spend countless hours looking through them and testing each setting. A dedicated app should be able to pull ALL the right-click/context menu settings and help me view or edit the entries for a particular program. However, all the apps that I have found are limited and the only ones that come closed are made by NirSoft but still can't find the solution.
If I find the answer I'll post it here.
Thanks for your help.