To create a Match File, first select the number of hands in your match (4, 8, 16, or 24) and then select the scoring mode - IMPs, Match Points, or Total Points. With only one computer, first you play all the hands in the match, then your partner plays them.
This feature works best if you have two computers connected over a LAN. Then you can both play simultaneously, using the same Match File. Results are maintained in real time, adding to your enjoyment.
There's no limit to the number of people who can play a match, but generally it's just two. Here's the layout of the Match Scoreboard.