To upgrade an Ouvvi v4 Instance to the latest version. First install the latest version of Data Synchronisation Studio then Stop the Ouvvi Service(s).
Then run the following commands in Windows PowerShell to copy the files into your Ouvvi Instance.
# Import Ouvvi PowerShell Module
Import-Module OuvviAdministration
# Update Ouvvi Instance
Update-Ouvvi -targetPath C:\OuvviTenants\Default
Next open a browser to Ouvvi to verify the update was applied successfully and that no more steps are required. Then re-start the Ouvvi Service.