After installation, any customizations, add-ons, or third-party applications previously installed might need to be reapplied. The settings for the installation location, license manager (for Concurrent Use), or authorization information (for Single Use) are retained in the upgrade. The ArcGIS Desktop 10.8.2 setup is designed to detect and upgrade an existing installation of ArcGIS Desktop (version 10.3 or later) on the target system.