I deleted manual Knight Online because I wanted to ReInstall but (Un)Install File didin't work it said error... After I deleted it I downloaded the newest Client and everything else. I launched "KnightOnLineSetup_1506.exe" (Install File) but it said error.
This one:


I've found a Program with name "KnightOnline" (other one) but when I was trying to uninstall it too, it gave same error window...



Please tell me what do you think what should I do...