Java Web Start is a built-in feature of recent versions of Java. It is included with Java version 1.4 for Windows and is pre-installed on Mac OS X 10.2 or later.
Java Web Start lets you create an icon on your desktop for the application. Every time the application is started it makes sure you have the latest released version before running. The program is installed on your hard disk and new files are only downloaded when necessary. This allows you to get improvements to the Vlog Client with no effort on your part!