This is the latest full version (v.3.4) of DiskAnalyzer Pro released on 3rd February 2010 and normally costing $29.95us for single user license.

This from the publisher:

"DiskAnalyzer Pro helps you to locate and remove space wasting files on your hard disk drive. You can see exact disk space utilization with detailed disk space reports. You can see reports grouped by file types, attributes, file size, ownership, date and time. You can search and filter for all types of files, move or delete unwanted files, copy files to another path, compress files and create a single ZIP file. All disk space reports can be saved to external files such as HTML, CSV, ASCII and XML. This is useful if you want to keep disk space reports history or import data into any other program. You can find out duplicate files, junk files, temporary and internet files, images, videos, audio files, zip files using DiskAnalyzer Pro."

You can read all about the product and download from the promotion page here.

No need to register...just download and install.