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I'm extremely confused on how to use this. You 'provided a "demo" but there's not an actual demo in the .rar file, it's just an img folder and the plugin itself...

This seems intriguing but I'm frustrated so I'm probably going to end up passing on this, sadly.

Sorry for the confusion. It's up to you to use it or not,
but about how to install this plugin:
You just copy/paste all images file from the demo into your project img/pictures folder. After that, you will install this plugin as normally how you will install other plugins.