The answer to the question is to download the latest version of Delicious Library 3 for Mac from the official website and then follow the instructions for installation.
NOTE: Delicious Library 3 is now available on the Mac App Store (but requires at least Mountain Lion).
Immediately organize your music collection and find missing song info.
It helps you keep track of your book, movie, comics and music collection.
The answer to the question is to download the latest version of Delicious Library 3 for Mac from the official website and then follow the instructions for installation.