Installshield Product Code -

The Digital Fingerprint: Understanding the InstallShield Product Code In the world of Windows software installation, the Product Code

| | Upgrade Code | Product Code | |---|---|---| | Changes over product lifetime? | ❌ No | ✅ Yes (major updates) | | Used for | Finding previous versions to upgrade | Identifying current installed instance | | Side-by-side install possible? | No (same Upgrade Code) | Yes (different Product Code) | installshield product code

Reference this in your main project. This allows you to change the code once for all build configurations. The product is a major new release (e

You MUST change the Product Code when:

1. The product is a major new release (e.g., v2.0 to v3.0) where a full uninstall of the previous version is required.
2. The installation database structure changes significantly (e.g., new components, removed components, changes to key paths).
3. You are patching and need to uninstall the previous version completely (a "major upgrade").
4. The product's language or platform changes (e.g., from x86 to x64).

• Upgrade Code: Stays constant for the life of your product (e.g., "MyApp Suite v1, v2, v3..."). It connects the dots.
• Product Code: Changes only when you do a Major Upgrade. It tells Windows Installer: "This is a brand new build, uninstall the old one."

Features are the high-level building blocks that end-users see in the "Custom Setup" dialog. 1. Open the Features View Upgrade Code: Stays constant for the life of

2. Change the Product Code GUID via the Product Properties view under the main Installation Information/ General Information node. SliQ Invoicing InstallShield Major Upgrade - SliQ Invoice Software

Example scenarios

• Scenario A — Patch/Minor update:

  Unique Identity: It distinguishes your application from every other application in the Windows ecosystem.