Whichever you choose, you still reach the same VizZle program. You can use either method anytime. Note: For drag-and-drop importing of personal media from the desktop into VizZle, you will need to choose Install to Device.
Takes you to the online login page–no installation required. It's the best choice if you don't have “administrative privileges” (you aren't allowed to download and install programs).
Takes you to the links and instructions for downloading and installing (both for desktop and for mobile apps). Once installed, you'll launch by clicking an icon on your desktop.