I've got a whole lot of songs in my iTunes that are Protected AAC. I'm trying to figure out how to upgrade these to 256, non-DRM. It seems that I have to subscribe to iMatch to do this. But I'm not sure exactly what the procedure is. If I pay the $25, will I be able to upgrade all of my Protected AAC files on my iTunes to 256 non-Protected? Is the upgrade done automatically, or do I need to do each song or album one at a time? After the upgrade, are my files permanently 256 AAC, or is there some caveat that they can go back to DRM? What if I stop paying for Match? Will the non-protected filed reside on my computer or in the cloud? that is, can I play them with audiophile software, such as Amarra or Audivarna? Thanks.