[Dx4win] Automatic Backup doesn't work?

[W5LT]

Hi All:
DX4WIN lost a few of my latest Q's last night when XP did a 'security
update' on my laptop.
I am using 7.02.15.
The update reboots while DX4WIN is running, and apparently the program does
not shut down & recover gracefully.
I usually do a 'save' after a QSO to be sure it is saved to disk, but in
this case I must have forgot.
I have set the 'backup' time to 1 minute in the preferences, and thought
that would protect me when I forget to manually save the file.
After this event, I monitored the log file while the program is running
(using Explorer), and never saw the date/time change as I would expect if it
did a 'auto save'.
Am I missing something or need to set the auto-backup feature differently?
Thanks for any help/suggestions.

Bob, W5LT