SlideDeck 2.1 introduces a new system called 'Addons'. Addons are additional features that can be installed on top of the basic SlideDeck plugin. If you're a Professional or Developer package user, you simply need to install SlideDeck, then head over to the SlideDeck Addons screen - here's a screenshot: https://skitch.com/jasonatdt/ebxwg/edit-post-slidedeck-web-slider-wordpress
From this page, you'll be able to install all the addons associated with your license. You can also upgrade to get additional Addons from within the plugin - easy!