The upgrade does two things. Firstly it upgrades the database by making changes to the tables, user  defined functions etc. Secondly, it replaces the Recorder 6 application on the server with the latest version. The upgrade does nof make any changes on the workstations. The upgrade takes only a few minutes to run. It needs to be run from one of the  workstations as it uses the workstation registry to obtain the sql instance and location if the application. The  main thing to note is that the person running the upgrade must have sufficient permissions on the Sql instance (admin permissions)  to make the changes and permissions on the server to replace the application. Following some updates users may be required to use Recorder 6 to rebuild the 4 index tables.