spaceindaver

This is going to sound like a stupid question, but... how do I use it? I'm in a LAN server on my own, putting down buildings (I'm wanting to run a campaign as a GM, with base upgrades over time). Where do I go to export the current state of things as a mission file? Is it a module I have to drop on Zeus? Or have I completely got the wrong end of the stick about what this does?