DbVisualizer is licensed per USER -- not per machine. We’ve done this so that you can benefit from our product at home and in your office without paying more than a single subscription fee. 

DbVisualizer is from January 2022 made available as a subscription. During your subscription, you are eligible to download any new versions, upgrades and maintenance releases at no additional cost. If you choose to end your subscription, you can continue to  perpetually use any version that was made available during your term. 

Check the EULA for more details.