Just posting an update of my experience April 2020.
Requiem still worked for me. On SD (TV Show) content.
It was inconvenient, yes, but following these steps, I got it to work on my Win10 PC.
1. Uninstall existing iTunes and also uninstall the following (You
must uninstall all of these in order to successfully re-install the older version):
- Apple Software Update
- Apple Mobile Device Support
- Bonjour
- Apple Application Support 32-bit
- Apple Application Support 64-bit
2. Download and Install iTunes 10.7 from Apple:
3. Download Requiem 4.1
https://download.digiex.net/Apps/Requiem/requiem-4.1-win.zip
4. I had to rename the folder iTunes library located at
c:/Users/~username~/Music/iTunes to something else in order for 10.7 to start properly
5. Launch iTunes 10.7 and download the content you want to remove DRM from.
- (If you previously had content the content already downloaded in your previous iTunes install, its possible to copy the files to your new library locally if you know where the files are located. You may want to plan ahead and make sure you know where those files are stored before downgrading iTunes.)
6. Ensure the files play correctly in iTunes. You may need to remove Authorization (under the "Store" menu) and then re-authorize your computer in order for the files to work.
7. Close iTunes, then launch requiem, and let it do its work.