I think lucamar did not address the "RTFM" to you, I understand his message as a response to my own post describing the source code navigation. He certainly is right, but knowing the poor quality of the help files I almost never look into the help files and almost always search information in the way I described. And knowing how to navigate inside complex source code is a key requirement when you want to understand the LCL or IDE internally.
I do agree that a property named "Files" is misleading for a component which searches for folders. Maybe the inherited name "Files" should be deprecated and replaced by a new name "Folders"? Of course, folders are some special kind of files after all, so I am not sure.