You should have the files

Airio.con.1
Airio.srv.1

Copy and paste them and rename them to

Airio.con.2
Airio.srv.2

Change the 2 new files to the details for your second server.

It should connect both the servers after a few minutes but if not just restart Airio.

I think free Airio can connect 3 servers but I might be wrong we have 7 connected on a pro airio.

I thought it was called 2 Girls 1 Cup.

Why not use 1 Airio for multiple servers you then have the server logs for the individual logs. And then you have the airio log for all.