Last Thursday a notice with instructions on downloading the free
upgrade to version 5.2a of CD Czar was emailed to all who purchased
the unlimited version in the past.

More than a few notices were returned because the email address used
when purchasing was no longer valid. If you purchased CD Czar before
Version 5.2a and did not receive a notice because your email address
changed, or because it was rejected by an overzealous spam filter, do
NOT reply to this message but instead send a message to the direct
support email address listed on your email receipt from our
Registration Agent. If your original email address is no longer
valid, list both your old and new addresses. If you think the notice
was blocked because of an overzealous spam filter, please send an
alternate email address as well as listing your original email
address. In either case, also list your order number and order date
as on the original email receipt. To repeat, do NOT send that info
to this support group but to the direct support email address on the
receipt, and you will receive instructions on downloading the free
upgrade. Please do so as soon as is convenient as the upgrade
installation file is due to be removed at the end of this week.

There were some nifty improvements to CD Czar if I do say so myself
and I believe they are well worth the small trouble of upgrading, you
can see a list of changes at:
http://www.zipcon.net/~highroad/CDCzar/versions.html

HighRoad Software