Had a search can't seem to find the answer... I have an older RNS-E (192H). I need to update to SW0650 in order to get my aux-in retrofit to function correctly. Will any disk work? I've seen a fair few on ebay all the way up to the latest 2013 version. My worry is some of the versions may only be compatible with the newer RNS-E 193G model or similar, and not the older one. Thanks in advance.