I couldn't find any documentation on this one -- seems to be similar files, but not the same. In the readme, the instructions say to interact with "PlayFabPlugin", but there's both a "PlayFabPlugin" dir and "PlayFabPlugin" zip file.
I went ahead with the dir instead of zip, but what is the zip for? Perhaps add to the readme, or an in-dir readme doc describing what the diff between the two is?