Install Plugins which have folder structure

Dear Forum,

I downloaded Simon Cozens’ Callipers plugin: GitHub - simoncozens/Callipers: A Glyphs.app plugin for visualising stroke uniformity.
The zip contains a folder structure with several sub-folders and files inside it – and not the *.plugin file format which I mostly came across:

Where do I have to move those files to?

Many thanks!
Johannes

You loaded the source code. There should be a link to the compiled version of the plugin. Look for ‘Releases’ on the github page.