This is an excellent plugin that is clearly going to add great functionality.
But this version loaded here is totally non-functioning. In other words, it's just the demo - and you cannot actually add any content into your pages with this. The so-called documentation only explains how to use the demo, and the reference to 'shortcodes' is not in the normal sense you would understand them with a plugin - the demo is using its own 'shortcodes' after you select what type of content to add to your grid sections, but doesn't actually insert anything into your page.
Please, this is extremely irritating for serious website developers looking for plugin solutions to have this 'light' version presented as if it was fully functional in this 'light' format, when in fact it is totally non-functioning.
Perhaps this should be withdrawn from WordPress plugins until such time as it actually adds some real actual functionality.