John is correct. Here’s the official word direct from Sony.
Installing or registering software on multiple computersr
Published 06/08/2009 11:12 AM | Updated 10/04/2010 03:37 PM
What is the policy for installing and registering a Sony Creative Software program on multiple computers?
According the Sony Creative Software End User License Agreement, there is no restriction for installing or re-installing the software on multiple computers. Many users need to have the software installed on more than one computer (i.e., a home PC, a work PC, and a portable laptop) for the convenience of being able to work on projects at different locations. Our EULA allows for this type of use and only the purchase of a single license is required to do so.
If multiple, simultaneous use is needed, then according to the EULA purchase of multiple licenses will be required (i.e., a classroom or a business with multiple people using the same program at one time).