Hi Gadget,
Thank you very much for your reply.
I had a feeling this was going to be the only / 'best' way to do it... and yes, I did that about a month ago.
The biggest issue with this is that the export/import only contains data files, not the files & photos I have uploaded and spent literally 100s x x x of hours uploading, linking to the relevant people, adding details, links etc.
I have an enormous amount of rework to do it seems!

Now would like to see what I can do to help others not making the same mistake.
Would be great if they posted some sort of 'warning' / message, with links to articles that explain.
Again, do appreciate your time Gadget!
Warm Regards
Leanne