I downloaded the game and discover that you can edit the scripts.
So, if you're interrested, I figured out how to patch the script "LE - PTBVisuals" to prevent it to randomly crash the game (had the same issue with my own)
Replace the line 133 by "if @count <= 0 && !disposed? ; self.flash(Color.new(255,255,255), 24); @count = 48; end"
I added the "&& !disposed?" part if I remember correctly
Hope it helps :)