When an unload filename is entered in the reload dialog, the system
automatically itemises the file to see if it contains more than one copy of
the database. This is so it can present the user with a choice rather than
simply reloading the oldest and most obsolete copy of the database.
If the unload file is larger than the amount of free memory then the
itemise can be very slow and so the dialog can take a long time to
initialise.
The fixed dialog gives the user a choice with the default being to reload
the latest copy. The itemise is then done when the user presses ok.
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