First of all thanks that you took the effort to build this software.
Love the simplicity and effectiveness of your solution.
One thing I am missing using GP is to easily switch between main views using following keyboard shortcuts:
CMD+1 => Rack Space view
CMD+2 => Back view
CMD+3 => Setlist/Song view
Perhaps there is a smarter way to do it. However, this would be on my Wishlist.
Thanks and keep up the good work!