Mac OS Sierra 10.12.3    Finale SongWriter 2010.r2

I imported a piano song I recorded in Logic to Finale.  I am trying to find a simple way to assign the notes to the correct hand. It appears that in my version of Finale, the split point is middle C.  When I import the song into Finale, all notes played above middle C are grouped together as if to be played by the right hand. Parts of the piano piece however have both hands playing above middle C.  It seems an easy fix is in parts of the song where this is the case, to change the split point.  I cannot however figure out how to do this.

Is it possible on my version of Songwriter to change the split point for specific measures?

If not, is there another way to accomplish this?

Thanks