At this stage i assume you guys have downloaded the dual client binary from dual client page . Here is the step how to make it working:- unzip ragfree(date).zip you will get ragfree.exe make sure you have patch your client first. How to know you have finished ragnarok client patch is you can click start button to play ragnarok. copy this file and paste inside your ERO folder and it should be link this c:\Program Files\Gravity\ERO start your ragnarok free and have fun. Apply the same step for PAID ERO (ragexe.exe)
Openkore Ragnarokbot Manual