You can manually explore the registry tracking paths to locate your application identity:

The primary location is under the uninstall key. The system uses a specific registry key to store information about all installed applications that appear in the "Add or Remove Programs" list. This key is HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall . Within this key, the product code is stored as a subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\PRODUCT CODE . You can find the product code itself as a ProductGuid value under that subkey or see it referenced by name within the key's path.

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The is a unique Globally Unique Identifier (GUID) that identifies a specific version of a product. Every MSI-based installation project in InstallShield requires a Product Code to function correctly.

rules to automatically remove older versions of your software?

This guide breaks down what the Product Code is, why it matters, and how to manage it effectively. What is an InstallShield Product Code?