OK found the answer here: http://community.qlik.com/message/88068#88068 thanks to the "More like this" box
Shame even the tutorial is so hard to get working - doesn't bode well for the rest of the product. I managed to get a basic report on some database data (with some help from the forum posts again) the other day. This morning when I opened it again I got "No data to display". Took me half an hour or so to find the "reload" option in the file menu. Is it normal to have to go and click that every time you open a file?