Under iZotope's single license agreement, you are able to run your plug-in on one computer you own at a time.

This means that it's OK to re-install and re-authorize your plug-in on two different machines you own (for example, your studio workstation and your travel laptop), as long as you run the plug-in on one system at a time.

Multiple licenses can be purchased to run a plug-in on more than one system at a time - this is often a good solution for studios and educational institutions with multiple engineers and users.