Yeah, see, this is why it's important to say what specific actions you took rather than just say "I followed the instructions". Because the instructions tell you to put it in the root directory, not the Plugins folder.
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So if all you said was "I followed the instructions", I would think that you had put the files somewhere else entirely.
The idea is that these folders will merge with the folders of the same name -
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So you'll have stuff added in Plugins, but you'll also have stuff added in Data and Graphics, too.
(You also still didn't share the events like I asked you to...)