If this is the first time you are setting up a computer to use ProPresenter, there are a few things you need to do first to optimize your experience. The most important thing is to make sure your screens are properly configured, however there are some additional areas of consideration if the computer will be used in a "live" setting.
Check out the Configuring your Mac and/or Configuring your PC pages to learn about how to configure your specific computer, then head to the Downloading & Installing page for information on how to install ProPresenter.