Ok an update - I had email correspondence with Magix - they were very helpful and prompt.
The libraries I had, Majestic, Candy and Culture are now the World Library, Acoustic and Electric Basses plus Saxophone and Brass but with some additions.
They suggested downloading the sampler update and at the same time the new versions of the libraries.
Now these are big libraries (9 gb, 8 gb and 7gb I think!) but the nice thing is they come with a very efficient download and installation manager.
The sampler itself now comes with a large Free library as well.
So all in all a very positive experience.
Just finished downloading and installing - shall get playing with the sampler tomorrow I hope
Seems like they might be serious about keeping this product and pushing it - can only be good to have some more competition for our "friends" at NI!
Nigel