I spent 8+ hours and was half the way through fixing numerous errors and format issues with Einstein's "Relativity - The Special and General Theory" using Book Designer and then the power blinked off. I assumed there'd be no problem since I made frequent saves. But when I retrieved the last saved file, it was from yesterday and not today. I look in \Program Files\Book Designer 4.0\LastFile and indeed it's dated yesterday. I opened it and indeed it's yesterday's version. I've searched and see no other relevant files anywhere on my computer. I don't know think I'm up to starting all over on this one and would really like to get it back. Any ideas would be gratefully accepted.