Computers without internet

1. In the app on that computer: Settings → Plan & account. Copy its installation ID.
2. On any computer: sign in on your account page, paste the ID under A licence file for a computer without internet and download the file.
3. Back in the app: Choose a licence file… (or paste its contents) and press Use.

A licence file lasts up to 35 days and never longer than your paid period plus three days; download a new one before it ends. The computer counts towards your plan's computers like any other.