Yes, if you need a second (or more) seat to present to an audience with, you can follow the instructions below.
To add another seat to your ProPresenter 7 license, just go here… your options and pricing will be shown after you enter your existing information.
Note: If you are just wanting to create and/or edit content from a second computer, this does not require an additional purchase. Simply download ProPresenter from our site here and then either use it unregistered or register it with your license, but choose "Inactive". The only difference with an unregistered or inactive version of the software is a watermark on the outputs that does not affect presentations created on that machine.