[header] How to add explicit or clean tags in itunes with mp3tag (windows ) [title] Convert all your files to. M4a files if they are not already in that format. [step] Itunes can do this. You can select all of your music files, right click, and click " create aac version. 
" however, this option converts your music files and moves them to a different folder which you will have to hunt down. I would suggest downloading a different software, such as realplayer converter, which is free, to convert the files to.