If you are the admin/owner of the Vitruvius account you can add additional employees as sub-users to your account.
First click the arrow icon within the app and select "Account" from the menu.
Then click the users tab and then click "Add New User" in order to add a new user.
Fill in the add new user form and click save.
The added user will be sent the login information in order to use the application. You can concurrently use the amount of licenses purchased.