You can specify most of the install operations concerning files, folder or shortcuts in the Files and Folders page.
Adding and removing files to the installation; setting file properties.
Adding and removing folders to the installation.
Adding and removing shortcuts in the installation; setting shortcut properties.
The right pane will display all the files and details from the selected folder in the left panel. If a file doesn't exist anymore at the specified location, it will be shown with a question mark icon and “???” as its size. You can restore this file by double-clicking it and setting its correct path.