Click the ellipsis ("..."), and the Select Target File dialog box displays. From the Product Tree displayed on the left, highlight the Files bean that contains the platform-specific executable that this Desktop Icon should activate, or the Launcher bean for the Java application that this Desktop Icon should execute.

If you set this property via the dialog box, then the Relative Platform Specific Target property should be set to "False".

NOTE: You can also target the Uninstaller Launcher, using this property — Specify the File Name property for this platform's Uninstaller Launcher.