Change IP :
Muserver\ConnectServer\ListServer.dat
Muserver\Data\IMapServerInfo.dat
Change Password :
Muserver\CashShopServer\CashShopOption.ini
Muserver\EventServer\event.ini
Muserver\ExDB\exdb.ini
Muserver\RankingServer\rankin.ini
elsewhere : 127.0.0.1