I receive the following error: "Could not complete your request because Photoshop does not recognize this type of file"

This error happens when you are trying to double click on the plug-in itself to launch.  When you double click on a plug-in Photoshop attempts to open the plug-in like an image.  You want to first start Photoshop, open up an image, and then go to the onOne menu (between Window and Help) and launch the plug-in from there.