Knowledgebase: Respondus 4.0 > Getting Started
How do I purchase a permanent activation password for Respondus 4?
Posted by Respondus Support

You can purchase a permanent activation password by going to the Respondus web site, "Respondus 4.0 Single User License": http://www.respondus.com/products/respondus/single.shtml

Select the option to purchase a permanent activation password.