The Pix4Dmapper license is assigned to the computer.
If multiple users use the same computer, they all need to activate the Pix4Dmapper license for the first time. Then, they do not need to deactivate and activate it each time that the user changes. If any of the users deactivate the software, it will affect all users.
For step-by-step instructions about how to download, install and activate Pix4Dmapper: Software Download and Installation.