Perform the following tasks to upgrade P4 Plan Web on Windows.
1. If either the P4 Plan Web API or P4 Plan Web Integrations services are running, stop them before proceeding.
2. Download the latest version of P4 Plan Web.
3. Unzip all files in the location where P4 Plan Web is installed. Overwrite any existing files.
4. Run PowerShell as Administrator.
5. Run .\upgrade.ps1