Look for the install icon in the address bar (a small monitor with a down arrow), or open the browser menu and choose Install Magisterium AI… / Apps → Install this site as an app.
Confirm in the Install app? dialog. Magisterium AI opens in its own window and is added to your Applications / Start menu.
The install icon sits at the right end of the address bar:
Chrome / Edge address bar with the install icon highlighted
Click it and Chrome surfaces a confirmation dialog:
Chrome 'Install app?' confirmation dialog
On Windows, you can then launch the installed app from the Start menu:
Windows Start menu search showing the installed Magisterium AI app