When you purchase a dslrBooth license, you are entitled to one free year of updates and support.
After that year, you can renew your license for an additional year. The renewal price is currently $25 for the Standard Edition and $75 for the Professional Edition.
To renew, open the dslrBooth application while connected to the internet. You will see a pop-up asking for the renewal. Click on Renew and go through the checkout process. You can also renew by going to dslrBooth > Register in the top menu.