This is version 1.0.2, while it has been reported newer versions do
exist:
<http://campus.fortunecity.com/yale/244/mac/c.htm>

A serial number is written in the manual.

From the Readme:
CD Directory is a cataloguing product for CD-ROM users created by
Connectix. It allows CD collections to be catalogued into the 'CD
Library' on the Macintosh Desktop.
Browsing through the library is like browsing any other Macintosh
volume, except the contents are the CDs which have been catalogued.
The complete file and folder structure of the CD is maintained.

The files and folders in a catalog can be renamed or repositioned and
the folder views can be changed. These changes are maintained, unlike
on a CD.
When an attempt is made to open a file in a catalog a prompt to insert
the CD is given.

Compatibility
Architecture: 68k

In emulators, it seems to catalogue real CD-ROMs only.

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