Similar process for an AMD gpu, but I'm showing Intel since that's what I have. I have a high end gpu, though it does work with integrated gpus like the Intel HD 4000.
1. Right click desktop and open up Nvidia Control Panel
2. Select the executeable file for Onigiri. You will have to browse for it. If you saved it in the default path, navigate in the following manner.
3. Adjust the settings at your discretion. Higher does not necessarily mean better. Note: Antialiasing Mode must be set to Enhance as opposed to override if you want this to work.
Preview
Before - notice jagged legs
After - ohbby
Cheers