After Update 5 my logbook stopped recording flights. I thought it was due to update 5. I ran across a thread about this on the MSFS forum, and one suggestion was to turn off developer mode. I had dev mode turned on. Turned it off, and now my flights are being logged again. I don't know why I care about the logbook all of a sudden. I didn't care if it worked in FSX or FS9. Besides, I don't do Los Angeles to Sydney flights in FS so my hours don't build up fast. Anyhow, something to try if you do care about the logbook and yours isn't logging.