Changing id3 tag
It's a bit odd, but I could not anymore change id3 tag with iTunes.
I need to change the id3 tags of audio books from v2.4 to v2.3, because my mp3 player do not support v2.4. I used to do it with iTunes just selecting all files in a play list and clicking with two fingers and there was opinion "Change id3 tag". Today I realized it had disappeared.
Could someone help how I get that opinion there back? And could someone tell why this had happened? I'm afraid I have a virus on my computer.
MacBook Pro with Retina display, OS X Yosemite (10.10.5)