Not easily. The FAQ:
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Q): How do I un-archive?

A): You don't. The only ways to undo the effects of archiving are to go to
the archive file and enter/import newer transactions or to export the
transactions from the archive file and import them into your current file.
Both involve going through the .QIF export/import process. Neither is
trouble-free. See the MSKB for Microsoft's approach.

Archiving will shrink your file size somewhat. There have been some reports
that archiving helps performance problems. Archiving will not remove old
investment account activity. That's about all it does.

For these reasons, many of us do not recommend archiving and do not do it
ourselves. If you start recording all kinds of interesting memo data (like
serial numbers for your toys, warranty lengths, the genus and species of
plants you bought for your garden and so on) you, too, will not want to
archive.

If you archived recently enough, you can use the archive file you created in
place of the file that Archive removed transactions from. It has all of the
transactions in your entire Money file as of the date you archived, not just
ones before the archive date. This is another result of the rather odd
design for archiving.

References:
MSKB: 133485 How to un-archive
<http://support.microsoft.com/default...b;EN-US;133485
"Paulus" <paulus[at]domain.com> wrote in message
news:81IOa.8895$eE.124591[at]nasal.pacific.net.au...
- quote -

I use money 99. Can I reintegrate an archive into my working file?