I'm having both problems Joe.

I have two 850/Aeros remotes refusing to communicate (although others in the house do) + I need to update the library and cannot connect to do that.

I just tried the nXG program and it would not communicate either so it looks like the problems are with the remotes, not the program. I've just tried contacting URC for the third time by email (they ignored the other two) and I've been unable to find an installer who will help with contact to URC (I offered to pay for the service) so I'm still left with two unusable remotes :-(

Back to the Panasonic file set - the MXeditor I have only goes up to Panasonic 17 and I need Panasonic 21. The nXG only goes up to Panasonic 11 so is even less helpful.

Any further suggests gratefully appreciated.

TIA

John