The DeltaV software and the DeltaV Excel Add-in versions must match. Therefore, you must uninstall the DeltaV Excel Add-in whenever you uninstall or upgrade DeltaV. You can then reinstall the DeltaV Excel Add-in after you reinstall or upgrade DeltaV.
Uninstall the DeltaV Excel Add-in before uninstalling or upgrading DeltaV and deleting DeltaV folders.