OK, I got a few steps further... I now have an expiry date and max number of downloads showing! Yesterday I even had the download link there but when you clicked it the link went nowhere (well to a page not found).
This morning I restored the database to a backup I did on Sunday, went through the same? steps I did yesterday... I can still get the expiry date and max number of downloads to show correctly but I have lost the link?
If I ever find a way to get the link back what would stop the link working, the file is in the downloads folder (downloads folder is set to 777 pub folder set to 755)
Paul