iCorrect EditLab Pro is a plug-in. That means it cannot be run on your computer by itself. Instead, it must be run from within another program (called a host program) that has been specifically designed to support Adobe Photoshop Filter plug-ins. Because of the somewhat unusual characteristics of plug-in software, the installation process involves two steps: extracting the Plug-in files from the archive file, and then copying the plug-in file to the Plug-ins/Filters subfolder of the host application program.
Once the plug-in has been properly installed, it may be used by launching Photoshop, opening an RGB image, and then selecting EditLab from Photoshop's Filters menu: