Are you sure you have the latest version?
This from PG's website.........
PixelGenius has been testing our version 2 products in Photoshop CS6. We have updated our products to be compatible with the public beta of Photoshop CS6, although, as a beta, we are not "officially" supporting our products in the public beta of CS6. You will need to download the most recent versions of our products; PhotoKit Color 2.2.1, PhotoKit Sharpeners 2.0.6 and PhotoKit 2.0.4 for compatibility in the public beta of Photoshop CS6. When CS6 ships, we may post new versions, but our testing has indicated the updated versions should work fine.