I just had a computer crash

but luckily I had a backup of all files on Mach and am using a different laptop.I was using a Toshiba with the smoothstepper .And I have copied my Licence file in so that Is working it is licensed to me on start up.
I copied the XML file into the Mach directory where the old one was. I ran the driver test and get great strem sometimes and too high sometimes ,but found a thread to fix that , But my question is what file is the PORTS AND PINS configuration in? I thought that was the XML file , but when I open Mach and check the pin configuration everything is blank nothing checked pins not noted or anything. SOOO nothing runs and I know there is a file somewhere that I can copy to Mach from my old backup..
So which file do I need to put in Mach to get the ports and pins to change?
Thanks
Gary