Return of Reckoning

i tried to login but it show me- Error starting: System.UnauthorizedAccessException:
в System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
в System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
в System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
в System.IO.FileStream..ctor(String path, FileMode mode)
в RoRLauncher.Client.patchExe()
в RoRLauncher.Client.Handle(PacketIn packet)

Remove read only on the game folder. Check the stickied FAQ topic that provides steps on how to if you don't know:
viewtopic.php?f=4&t=2889