Like before, you can simply extract the setup file to a folder on your drive and run the ChromeLoader executable to launch the regular portable application, or IncognitoChromeLoader.exe to open a new private browsing mode window. The application is completely self-contained in the folder, so if you are running a previous portable version you can simply copy the files over top to upgrade—just don't copy the Profile folder since that contains your user settings.
Portable Google Chrome is a free download, Windows only. The download page is in German, but the application itself will work in English. For more, check out how to drag tabs from Google Chrome over to Firefox, and vice-versa.