I am pretty sure you can change the download settings to be MP3 not AAC on i-tunes. I just downloaded Linkin Park and then imported it over to my son's MP3 player software(proprietary) and it found it and imported it no problem. This software is for a kids MP3 player which is much larger than usual and tough as nails as the boys have dropped theirs numerous times and they still work. The software is not very sophisticated and only sees MP3 or WAV files.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70