Installation steps
Mac: Install Manifestation Station.saver once. Select it in Screen Saver settings, then choose Options → Import intentions and select your downloaded HTML file.
Windows: Install the free Lively Wallpaper app. Add your downloaded HTML file to its library, then follow Settings → Screensaver to enable it. The Microsoft Store version must keep running in the background.
To update your words, download a new Screensaver file. Import it again on Mac, or add the new file and select it in Lively on Windows. You only install the player once.
Lively screensaver setup guide
Windows playback in Lively is awaiting a PC test.