After choosing to "Import from DVD/DVD-VR", the computer will spend a few seconds scanning the DVD Content.
A new window, you are able to play the videos in a preview panel, but the "Import" and "Stop Import" buttons will be grayed out at the bottom of the window.
The import button will remain grayed out until a portion of the DVD is selected to capture. The top left pane shows the chapters and will have empty checkbox squares, which when checked, indicate what chapter(s) of the DVD will be imported.
Once at least one checkbox is checked, the Import button will be usable and no longer be grayed out.