All you'll have to do is go to the folders in which they are installed and view them from the program’s own window. You can thus easily and conveniently see what you have, what's not needed, and what you are missing. Much more convenient than doing it from Photoshop itself.
Plus, it also lets you browse through the fonts installed on your computer, or just organize your folders from a clean and eye-pleasing interface.
Preset Viewer Breeze is a very interesting application that will prove especially useful to regular users of Adobe Photoshop.
Functional for a seven day trial period.