Hey @thombach001 , welcome to our Forum, and thanks for your inquiry.
You can gladly upgrade your yearly fixed-seat license to a floating license (just not the other way around) - for that, simply contact with your information, and they’ll help you out in no-time.
That is completely possible! Just be aware that you can only run multiple instances of Enscape simultaneously on two (or more) different machines if you also own multiple seats (in this case 2).