Knights of Valour Seven Spirits help

I have downloaded the Demul Emulator. I have downloaded the Knights of Valor Seven Spirits rom file.

I have also downloaded WinRAR because the Demul was in rar format.

How do I get this to work? Can anyone tell me the exact steps?

PC specifications:

Operating System: Windows 7 Ultimate
Processor: i7 @ 2.80 GHz - 2.79 GHz
RAM: 4.0 GB

Thank you.