The Export Tool page, I just realized, has that series of checkboxes for what you want to export -- and the one for 'Entries' is, for some reason, called 'Event'. Even though it's bolded, I'd really have no clue that event = entry.
I'm not sure the feasability of getting that checkbox renamed on that page (which would be ideal), so I'll just suggest changing the FAQ instead. Can we insert a line somewhere in the Export Tool section saying "use the checkboxes to select which parts of your entries you want exported, and ensure that you keep the Event checkbox selected as that is the body of the entry itself"... only something that doesn't such that much.
We don't have any mention of what the checkboxes either in the faq or on the export page itself, so adding that line in (with the further emphasis on the Event one) is probably a good thing.