if you have 2 folders im guessing there client and source... go into source change the ip to 0.0.0.0 or 127.0.0.1 then go into client and change the ip in the client.java and gui.java or egui.java then compile both things with jdk. then run source, then client, if you get run errors which consist of "cannot find the path specified" right click the run.bat and change the location of which it gets the java. but if theres loads of errors, i would recommneded getting a better source/client.