These are all user to user forums. So no-one here can give you an answer to the question you have posed, unfortunately. I suggest you contact support direct, at http://support.magix.com
However, I'm a little confused by you implying you need the AAC Encoder in order to burn CDs. CDs must have 16 bit, 44.1kHz uncompressed wav files in order to be playable by a standard CD player.