Cannot use custom nodes

I tried to use some custom nodes I found on Github. I did what the instructions said; I made a folder called “Libraries” in the same place as the blend and cloned the files into it, then restarted Blender. Nothing happened. The nodes aren’t there. Can someone tell me what the problem might be?

Edit: Turns out that the files have to be cloned and not pasted, and it works now. Not sure why though.
Edit again: For some reason it will only work in the “temp” folder. Now i’m confused again.
Edit again: it works now after i did some stuff but still not entirely sure what makes it work and what doesn’t