MSI Factory

Upgrade code:

The upgrade code (GUID) of the product that this installer will perform a major upgrade on. Usually this is the same as the Upgrade code setting on the Product tab of the Project Settings dialog.

Upgrade versions:

A list of versions of the product identified by Upgrade code above that are valid for this installer to upgrade. Click the Add button to open the Upgrade Version dialog and add a new version. You must have at least one upgrade version element present for each upgrade code.

More Information

MSDN Online: Upgrade Table

WiX Help File: Upgrade Element

WiX Help File: UpgradeVersion Element

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