Johan welcome to Caedes my friend hope you enjoy your time here looking forward to see what your new Nikon does so don't let us wait to long before you start posting. You asked about the software I use to edit my pictures follow the link in the blue letters Paint.net instal and use a couple days and then get one off the many plugin packs I find its as good as Gimp but it renders faster and I think has a bet layout as I said hope you enjoy your time here.
The reason why the sun sets in the evening is because it wants to see the sunrise in the morning. I rise in the morning because I want to see them both. RvdB