The first thing I would ask is, what else did you change since the last time the software worked? Windows update? Anti-virus? Other programs?
Also, have you updated the software recently? Have you run the Windows Program Compatibility Troubleshooter (Settings\Update&Security\Troubleshoot\Additional Troubleshooters)?

Have you tried temporarily disabling Windows Security and Malwarebytes (presumably disconnected from online) to see if that makes a difference?

Have you tried contacting the author through their website?

Maybe they can help you.

I don’t have Windows 11, but I DO have Windows 10 22H2. Controlled Folder Access is a feature that’s built into Defender, and you access it from within Defender.

If, after reading the process below, someone who has Windows 11 22H2 or 21H2 knows of any difference in how you get to Controlled folder access in Windows11, please feel free to chime in!

To get to Controlled Folder Access, here’s what I have to do (and I’m presuming that it’s really similar or identical in Windows 11):

Open Windows Security and click on the item that says “Virus & threat protection”. Once that’s opened, scroll sown the page until you see “Ransomware protection” and click on the blue colored type that says “Manage ransomware protection” just under it. You should now be looking at a page that has Controlled folder access on it and a slider to either turn it off or on. There should also be some options below it, again in blue colored type.

One of those items should say “Protected folders”. Click on that and you can add folders to the protection or remove them from protection. If you find the folders on the NAS that hold your music files on this list, you can remove those from the list if you like. Doing this will remove them from protection. Before you do this, though, please read on.

BUT, another item may very well say “Allow an app through Controlled folder access”. Clicking on this item will allow you to add the music file editing program to an exemption list of sorts so that it will be allowed to access the folder on the NAS that your music is in so you can edit their properties as you see fit. This, to me, seems like a better option that will still allow the folder/folders to be protected, but still allow your program to access them to edit the files as you see fit.

As an aside, I first ran across the controlled folder access problem when I first used Windows 10. I wanted to use chkdsk to check a disk’s file structure, but controlled folder access wouldn’t allow the program to run, even with administrator privileges, so I added it to the exemption list.

Nearly a year later, after a definition update, it suddenly wouldn’t allow the volume shadow copy service (vss.exe) from Windows to run as it’s supposed to during an update’s installation. By default, when Windows installs one of its updates through the use of Windows Update (or downloading an update directly from the Microsoft’s catalog and double clicking on the .msi file), it creates a restore point in the event the update installation goes sideways. Controlled folder access wouldn’t allow this vital service to run after a new definition update was released, so I added the vss.exe service to the exemption list and everything’s now happy.