Yes, but since FX3 got its own configuration in PinballX it should also have its own list in Game List Manager otherwise you could not do your list for both systems I think. To get cabinet mode just open up a table in FX3 and hit ESC. You will see the options where cabinet support can be found.
Download PinballX 2.40 and you can configure both FX2 and FX3. But I am facing the problem that the Game List Manager only contents FX2.
We need to move most games to FX3 and leave some FX2 left.