Steve,

The "Detect Previous Version" function uses the Product GUID of previously distributed versions to determine if the application is installed on the client. It only works if the previous installation created a Product GUID (code) in the following section of the Windows registry:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curr entVersion\Uninstall

SetupBuilder automatically creates this item if the Add/Remove Programs Support option is enabled in the "General Information" Visualizer.

The above installation information is a Windows development guidelines requirement.

Friedrich