XC-Soar

Does anybody know how to load the maps with .xcm extension?
My map display page layout is completly different from that described
in the 5.1.2 manual and only allows selection of topology and terrain
files, it will not allow selection of .xcm.

there must be a way of doing it, but I'm blowed if I can find it.

As a newbie I must say the Designers and Implementers have gone to a
great deal of trouble to make it complicated! We need a plain brand
stripped version for those who want to fly and not spend all time
poking buttons etc.
Mike