cakass

Thanks Carike and Ipstenu for your suggestions. I appreciate your help. A reply button has mysteriously reappeared on comments but not the main post. I think I am going to have to try the upgrade. The trouble is that I am doing this as a favour, and have other things to do, and as a WP novice I get bogged down trying to sort out problems. I did try to set up a local install to prototype the upgrade at home but could not find a compatible server. The current configuration is in a subfolder within the public-html directory and addressed as domain/subfolder. Is it possible to make a copy of this under a new name in public_html and prototype using that?

Neil, Thanks very much for your considerate and considered reply. I’ll follow your advice,