I was just putting the finishing touches to the programming for my new MX-850 and everything was working fine, with 6 devices and lots of learned IR codes. Then I hit a strange problem on the MX-850 Editor. It wouldn't let me delete the learned code on an LCD button. A few minutes later the Editor crashed. I restarted the Editor, made a few minor changes and downloaded the new version to the remote.

The problem then got much worse. The signals are being sent to my MRF-300 which appears to be issuing an IR signal via the front blaster, but many of my IR commands, particularly power on/off commands, are now failing to work. Aaaaargh!

Is there some sort of reset for the MX-850? Have I probably got a corrupted MXF file? Any suggestions for fixing this problem will be much appreciated.