Where are .h files when using libary manager?

I'm pretty new to Arduino and programming, so this might be a silly question - when I first used libraries I was just unzipping them to the Arduino/libraries folder, and could edit the files there if I needed to. I've recently been using the Include Library -> Add .Zip Library feature in the IDE, as it gives me access to examples etc, but this doesn't seem to result in the library files being stored in the library subfolder. Just wondering how I can access the files to make changes?

Thanks

They go to your user library folders, where you should be unzipping them. Not inside the install directory, that library folder is for built in libraries.

On windows 8 you can type this into explorer to get there: %USERPROFILE%\Documents\Arduino\libraries