I have installed Russell Brown's Adobe Paper Textures and Adobe Paper Texture Pro extensions from Adobe Exchange into my Photoshop CC. The Adobe Exchange panel in Photoshop AND the Extension Manager both show them as installed. However they do not appear in the menu under Window -> Extensions the way they are supposed to. I have uninstalled and reinstalled them multiple times, restarted Photoshop multiple times, and rebooted the system. I'm at a loss for what to try next.
This is Mac OS X 10.9.2 and all CC applications are up-to-date. I've run Disk Utility to make sure disk permissions are correct and it finds no errors.
Please help?