FYI, codeset 203 seems to be the one that works most consistently for us. Most of the codes in the various databases work fine - but may be sluggish or cause double press issues; stop/exit is the one sticking point. for each box its trial and error to see what combination will work best. 195 mostly works (except for stop/exit) unless this has been resolved in the newest ccp update (I know this doesn't help with regard to an mx650 - but if you have a ccp capable remote to help program with then it might).

As far as getting stop/exit to work on the MX650 you will probably be SOL. Time to recommend considering a new remote.