Map setup
The history only gives positions for unnamed systems. Place one home system (or none), then use Place home systems to fill the rest clockwise in seat order. Pick a system, then click its hex. Click an empty hex to cycle its type (empty, asteroid, nebula, supernova, gravity rift). Right-click a hex to clear it.
Upload the downloaded file to the server's games folder with the same name as the history file (e.g. mygame.txt + mygame.map.json).