You can switch between Live-Assist Mode and Decks Mode (Classic) through the Settings window. Go to File > Settings from the main window menu, then navigate to the General tab.

In the General tab, you'll find both a Live-Assist mode selection and Decks player mode selection option. PlayIt Live offers these two player modes, and you can select which mode you'd like to use. Live-Assist Mode provides automated playout with scheduling features, whilst Decks Mode (Classic) emulates a traditional cart machine where you manually control each player by pressing buttons.