According to our End user License aggrement ,end users who have purchased a single-user License may Install and Use the Software on two desktop computers for non-concurrent use only.User must activate the QXP license within 30 days of installation else it goes in Demo mode with reduced functionality.

The Activation process keeps a check on Software Piracy.

For more information, go through the link - EULA

Note: Does not apply to most QuarkXPress Site licenses.