You should now see the extensions populated from your local folder. Click the icon on the specific extension you need. Restart Altium to finalize the process.
And then, the spinning wheel of doom appears. Or worse, the dreaded "Cannot connect to server." altium extension offline install
Click the button (the gear icon) in the top right corner. You should now see the extensions populated from
Go to the page (usually found via the user icon or the Home screen). Click the Purchased or Updates tab. altium extension offline install