Step 1. Download the Update here (Version 5.2 Feb 16, 2013).
Step 2. Open the Disk Image, double click on "Remove Old Software."
Finish the uninstall process. Then restart your Mac.
Step 3. Open the Disk Image again, double click on "Install Version 5.2."
Finish the install process. Then restart your Mac.
If you previously downloaded the Release Candidate (Version 5.2 Dec 3, 2012), you do not need to apply this update.