So Wiese is correct, but if you have the latest build from steam, you can use some user settings to connect to another player with the same build.
I’ll make a proper write up later since we’re focused on the steam version right now, but here are the settings in the mean time:
"multiplayer" : {
"server" : { // These are the host settings
"port" : 57093,
"ip" : "0.0.0.0" // Leave this like this
},
"remote_server" : { // These are the client settings
"enabled" : false, // set to true to enable connecting to a remote server
"port" : 57093,
"ip" : "192.168.1.1"
}
},