Sorry to necro this, but I think it’s interesting enough
Programmer mode (hold the “setup” button, tap the orange key at 5, 1 [1]) on the LP Pro allows using all of the buttons/LEDs. The only thing which can’t be accessed in any way is the side LED - which indicates which mode you’re in.
Novation have actually gotten some pretty good press due to the hackability of the Pro.
[1] 1-based 