OK. Sorted out the new version. It’s now running live on this site. I had just one more problem (after I’d got the tar file extracted) which must be a PHP version difference between my local machine and my hosts server. A set of variables were out of scope causing a database access to fail on the stand alone archives page. Sorted now. I’ll look at the calendar next.
Short link to this post: https://z1.tl/vm