Thanks for the prompt responses, I did as suggested, and bought the game from GOG.
That has brought on its own set of problems.
Living on a boat, in Spain, I do not qualify for a mobile phone contract, that would let me buy up to 5 Gb at a time.
My vodafone modem is Pay As You GO, and the max I can buy is 2 Gb = 40 Euros .
It says that the game is 1.5 Gb, but it also comes with a load of freebees, that I suspect goes over my 2 Gb limit, because while waiting for my download to complete, vodafone pop up jumped up to inform me that I had reached my 2 Gb limit and was being cut off.
Any suggestions as to how I can carry on will be greatly appreciated.
Thanks In Advance.