The application is subject to the Browser and Java runtime imposed security restrictions and cant do anything to your system without your knowledge. Infact while you use the application, you will see the runtime prompting you to permit simple actions like opening an image file from your system.
You can remove the application completely anytime from your system using “Control panel->Add remove programs”
Why should I register?
You can try the card customization software free without registering, we only need you to register if you want to upload your customized card designs to us and place an order.
Can I see a glimpse of how the software works before I download
Yes you can see a small screen video.
here for windows.
here for Mac