Run the installer, and you should be met with the following screen:
The installer requires Windows update #2999226 to be installed. If you’re having trouble running the installer, please make sure to install that update via Windows Update or manually from the link.
The Monkey Island supports Chrome (and Chrome-based) browsers. Some Windows Servers only have Internet Explorer installed. Make sure to use Chrome or a similar modern browser. You can download Google Chrome from here.
To upgrade, download the new installer and run it. The new Monkey version should be installed over the old one.
If you’d like to keep your existing configuration, you can export it to a file by using the Export button and then import it to the new server.