The installer of the new release will execute an uninstall of the previous version. The uninstaller will delete all files that were copied to your computer by the installer. It includes the original settings, the ICAO airlines and airports files and also the FSNavigator database files. It also deletes the ASR files that were provided for the LHCC sectorfile. If you have saved any configuration to these files, or updated them manually, or downloaded a newer AIRAC database, then be sure to SAVE THEM to another place before running the installer.