I just upgraded from Windows 7 to Windows 10 and Drag and Drop from File Explorer to MP3Tag doesn't work for me. I get the "prohibited" cursor when I move the files over MP3Tag.
If I add a folder, the files are read, but dragging a drooping the cover doesn't work either.
I updated to the latest version of MP3Tag and I have the same problem.
I uninstalled MP3Tag, remove all the files, reinstalled and the problem persists.
I have been a user of MP3Tag for many years and I never had a problem.