Yes, if you purchased online, you can log into manage.techsmith.com to add a new seat to your subscription. The cost of your new seat will be prorated.
If you purchased through a local reseller, you can also add a new seat by contacting your reseller. Please note that if you purchased online or direct, it is not possible to add seats for Audiate through a local reseller at this time. This is currently a limitation of our system, and we are working on improving this experience. In the mean-time, please reach out to our sales team for further assistance.