This is something that came to my attention only recently and from searches it's clear it was not an issue previously. What caused it to start I don't know. I'm using Windows 10.
This can mess up your files everywhere; it's not specific to MRIN Filing but can certainly affect it.
It's a text file called 'desktop.ini'.
How it comes about is when you rename a folder and move its location it will create a desktop.ini to hold onto the old name. In the process it will actually refuse to register the new name. The file will look something like this where 51489 DHT-MHB is the folder name:
[.ShellClassInfo]
LocalizedResourceName=@51489 DHT-MHB,0
You can see how this would be a problem for your MRIN Filing. If you want to know if this has already affected your system, open the folder where you keep your MRIN Sources and do a search for desktop.ini. Hopefully you won't have any. If you do, you'll have to go to each folder and adjust accordingly.
What I've done is turn on the options at the top of Windows Explorer and tick, "Show Hidden Items" like this:
If a desktop.ini is suddenly created it will show itself next to the folder I've renamed. All it takes to get things back on track is to delete it.
If you're looking for a more satisfying way of fixing this, here's a simple video with the commands you'll need below the video:
How to Stop Desktop.ini File from Opening Automatically on Windows 11/10 Startup [Tutorial]
https://www.youtube.com/watch?v=RyzhgovPkJY