https://affinity.serif.com/en-gb/licence/

(i) if you are a private individual, to download, install, use and run for personal use, one (1) copy of the Serif Software directly on each computer running Microsoft Windows (“Windows Computer”) that you personally own or control. Commercial use is permitted but only use by you and not by any other users of any Windows Computers that you own or control. For example, other members of your household that use your Windows Computers may make personal use of the Serif Software whereas, if anyone other than yourself needs to make commercial use of the Serif Software, the other user will need to make a separate purchase.