The Photoshop CC Plug-In directory is normally: /Applications/Adobe Photoshop CC/Plug-Ins When launching Photoshop, make sure that you launch the Photoshop where you have installed the plug-in. Please make sure to check that the installation folder that Portrait Pro gives you is correct for the version of Photoshop that you want to use. The Circle to Square plugin transforms circular objects in an image into squares.
The Rule 30 plugin produces an abstract gray pattern, Veins transforms the image into color lines that look like blood veins, the three 'Gray from' plugins produce B/W images and Pixel Trash tries to imitate the computer graphics of the early 80s.