The first task was to download and make a copy of the relevant install file, then install it (fingers crossed).
This worked without a hitch, including registering it with my original product key.
I then loaded the relevant *.wpp file then saved it as a copy.
Step 2 was, following advice from this forum, to step through each page ensuring that each graphic file was correctly linked.
Step 3 was to repeat the above for each link to internal pages or documents still worked. Correct if not. Fortunately, they all worked.
Step 4 was to repeat Step 2 for each link to external pages, documents or websites.
Step 5 Test the link to the Host Server.
Step 6 PUBLISH and have a large glass of wine.
IT WORKED