Open your bundle and then right click underneath the 'Creation Output' label, located on the left-hand side of the application. You should see an option appear that says 'Closed Panels'.
Click on 'Closed panels'.
Underneath the ribbon in the top left you should now see a 'Leap' tab. Click the 'Leap' tab.
Now, just below the 'Save' button, in the top left of the application, 'Leap’ should be visible. Click it and a window containing your LEAP matters should appear.
You can re-dock this window by dragging it and dropping it on any of the visible blue squares that will appear when you start moving the window. It will snap into certain positions.