http://<webserver_name>/<subdirectory>/w2hlegacy/config/hostwizard.html
Both migration methods ensure that your Web-to-Host installation incorporates the most recent version numbers in the session HTML files. Once new software is downloaded to the client workstations, the version numbers on client workstations and session files must match. If new parameters exist in the current product version that were not defined in the migrated profile, Web-to-Host uses the default values.
Administrators should tell their users to click Yes.