After click Download button above, you’ll get sugar-calendar-zapier-1.0.zip. Normally, you have to unzip sugar-calendar-zapier-1.0.zip, then find the installable sub-zip to upload to your server or your Wordpress admin area. But there are times you don’t have to do that if there is no sub-zip files inside sugar-calendar-zapier-1.0.zip, e.g there is only one folder inside sugar-calendar-zapier-1.0.zip.