Hi orchestralala,
you are not "authorizing a computer", but you download a demo license for Vienna Suite that resides on your ViennaKey (or any other Syncrosoft eLicenser). You can install and use Vienna Suite on any computer you like, as long as you have the ViennaKey with your demo license connected to your computer and the latest Syncrosoft LCC installed.
You have 90 starts available with this Demo Licenses, which you can recharge via the Syncrosoft LCC for 30 days. Choose "Wizards" => "Activate Date Licenses" to recharge your starts.
Best,
Paul
Paul Kopf Product Manager VSL