NOTE: This information relates to older version of Adobe Creative Suite (CS5, CS5.5 and CS6), not Creative Cloud. For Creative Cloud, please refer to Adobe Exchange.
Installing the TimeTracker extension for Creative Suite is easy. After downloading the latest timetracker.zxp file, simply double-click on that .zxp file. Doing so will open the Adobe Extension Manager application. Extension Manager will automatically install the TimeTracker extension in the correct location for Adobe Photoshop, Illustrator, InDesign, InCopy and Flash Professional. After Extension Manager installs the TimeTracker extension, you will see "TimeTracker" in your list of application extensions. At this point, you can close Extension Manager.