For 64-bit applications on 64-bit Windows, check:
InstallShield provides several methods to manage this GUID. installshield product code
: Go to Installation Information > General Information in the View List. For 64-bit applications on 64-bit Windows
A major upgrade is a complete replacement of the older product. It typically involves a new Product Code and often a new directory structure, component IDs, or registry layout. or registry layout.