When you first open Qlik Sense, you come to the hub. This is the place where you have an overview of all your apps. The hubs look slightly different in the Desktop and server versions, but they are essentially the same. The following screenshot shows what a hub looks like:
The Qlik Sense hub
In Qlik Sense Desktop, you are greeted with a dialog where you are asked to create an app as shown in the following screenshot. In Qlik Sense server, you will find the corresponding functionality on a button on the right-hand side in the toolbar.
The Qlik Sense Desktop welcome dialog
Creating an app means that you will create a file that will hold both data and everything else needed to analyze it. In Qlik Sense Desktop, this file is created in C:UsershicDocumentsQlikSenseApps.