I’m updating the site as we speak. But yeah, once you buy it, you’ll get a Pulse download code (it’s a download manager that makes the sample extraction process super-fast automatic) for the samples and a link to the installation files that handle the plugin setup.
If you want to give it a try before purchase, why don’t you download Wolno - feltinstruments.com/Wolno - which is free, works as a plugin as well and might be a good chance to see how the setup process looks like?