Weird problem you're having. Have you sent any of your configurations to URC or anyone else to try to duplicate? If it's not a problem with your PC, you may have exceeded some limit in your MXF file.

I'm surprised they'd drop shotcuts from the MX900, that was a very handy concept, and without it you can't control multiple MRF stations from the same screen.

Watch out for the dropped key problems with the MX900's too ...