@Florian Thank you for the response Mr. Florian. I'm not sure what you mean when you say that it's read only because I can remove it just fine in my Music player i.e. MusicBee. There's also a utility build specifically for Apple tags called AtomicParsley that also does this but I looked around MP3Tag and couldn't figure out a way to call an external program with custom commands from within MP3Tag.
Sorry for the confusion, but MusicBee and AtomicParley can remove that Atom just fine. I don't understand the limitation in MP3tag. You don't have to answer that if you don't feel like it but do tell me if there's a way to call other programs or even batch files from within MP3Tag.
@Florian I got it working, is there a way to incorporate invoking this tool action in MP3Tag's standard Actions where multiple operations could be combined under one category and executed chronologically ?
You could create an external Batch-CMD file and combine in this file whatever AtomicParsley commands you need. Maybe in a FOR loop?
Then call this CMD file from Mp3tag as a Tool, for example with the path to your *.m4a files.
@LyricsLover Thanks. That's exactly what I did. Wrote a batch and calling it from context menu for all .m4a files. This gets it done. However, it would be better if MP3tag has the support for Atoms or calling other programs through Actions.