Installing a Second LabVIEW Executable Uninstalls the First - National Instruments:
Note: Duplicating a project (using File » Save As) with an installer build specification results in the same behavior. To prevent it, right-click the installer build specification in the new saved as copy of the LabVIEW project and select Duplicate. This copies the build specification but creates a new UpgradeCode. You can retain the old build specification in the Project Explorer or delete it.
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