It does have the app.config, but it doesn't use a user.config

I have "cleaned" the project. I have excluded whole custom classes from the main code and the issue still persists. I have even created a whole new project and moved the code over, no difference. I have removed all unneeded references.

Like I said, I don't think my code has anything to do with the issue, because if I change the file name to anything else, it executes correctly and does exactly what it was designed to do.