Sincere thanks Anthony.
I will certainly do that.
I had a couple of very kind other suggestions in fact, the generosity of members on the list was very evident.
Mark Bauger offered me a very useful workaround, that I take the liberty of pass on in case others have the same issue:
i) Upload pdf to google-drive
ii) Save as google doc
iii) download as a word file (see it as under a button on the top menu).
Astonishingly it worked - even in my klutzy hands. Thanks Mark - I think I summarised it OK. (seemed to work!).