There is only "Others" listed in the product panel. Apparently Extension Manager CC didn't recognize Photoshop CC was installed in your machine. Have you installed Photoshop CC (If you only have Photoshop CS6, you should use Extension Manager CS6 to install GuideGuide)? If yes, have you moved or renamed the Photoshop CC installation folder? Please search my post about "ExtendScript Toolkit" in this forum, then follow it to check if the product configuration database (PCD) is correct in your machine.