Can I use a single license on more than one machine?

Yes, but not simultaneously. Our products use a floating license system which allows multiple users to use it from different machines. For example, any number of users can have our product installed, but only one can use it at a time if there is only one license available. You can install the V-Ray license server on any machine you like - workstation, server, laptop or anything else. The server will spread licenses around depending on the number of licenses available.