Can the PG-200 be used with the 3P upgrade?  Yes. Due to the high number of requests an interface has been developed for this which will is a software only  upgrade and requires two wires to be run between midi interface board, the 3P Main Board and the 3P Upgrade  board.  I cannot get the Seq or Edit Write button to work in the 3P Upgrade  The memory protect switch on the rear of the 3P must be in the ‘Programmer’ position when writing tones, sequences  or patches. The centre position will protect the memory. The ‘midi’ position is not used and the 3P will accept midi  data when the switch is in the ‘Programmer’ position. This is what cutting link W5 on the midi board does during the  install. The Sequence or Edit Write buttons will flash all the Tones lights when the memory is protected. Can the Matrix 6 be used with the Patch Editor?  Not at the moment. The 6 has an unfinished sysex that does not allow for complete parameter control. This is  explained in the user manual. Due to demand I am going to revisit this and see how much I can get working.  Ableton Live will not record or pass some synths?  Ableton Live does not record or pass Sysex codes. Any synth that uses sysex cannot be used with this software. I tried to upload a new program file to the PE and it freezes during the Program File upload?  The Program file is a large file and if the buffer size and midi hardware combination is not correct all the file will not  be sent to the PE. If you are using MidiOX then try reducing the Buffer size to 128 or less. This will cause MidiOX to  send the file slower. The PE can keep up with full speed but many midi interfaces cannot.