Yeah I have hso se, as you say there are better libraries but for the money it ain’t bad, been using it myself for a few years…
I did see a link for it earlier when I got nsk… It’s an add on for hsse as you rightly assume, there is a link to all the trial versions on one of the pages that links from the email they sent out, it’s not a big button but just a link that you’re looking for…
Hth!