OK, i have seen many threads about this, but have not found a solution for my problem.

I bought a MX850 a couple years ago, got it programed, and absolutely love it.
Now, i recently bought an XBOX 360, and tried to update the codes to integrate it into my system.

Here are the problems I'm having in doing that....
My editing software is outdated.
I do not know the serial number.
The codes available on this site for the 360 are in .mxg format and my program will only recognize .mxf.

I found a phone number to call URC, but they are closed, and i am too impatient to wait til Monday.
So if someone can tell me where to update my software, or where to get the codes in the .mxf format, I'd be very appreciative.