Youtube downloader is being removed by Norton

I'm trying to download and install the latest version of the freeware Youtube Downloader product from the site:

youtubedownloader.guru

As soon as I click on the 'Download Now' button, Norton is displaying a message that the software is unsafe and has been removed from the computer.  It claims to have identified a threat "Suspicious.Cloud.9".

Is this software really unsafe?  I used to used an older version of the product with no problems, so I'm puzzled that a new version is suddenly considered to be unsafe.  As far as I know, it's a widely used freeware product.