However I have several questions, and won't post them all here in one post. I installed Mint after Windows completely crashed on my lap top. So I installed Mint as 'main tenant'. Install was easy, and no issues. My intention for this lap top is to use it solely for photography.
As I have been used to the MS method of installing programs, I am just a little stuck;
1. I have downloaded the Luminance ( .tar.gz ) file download, but just need a clue as to how install and run it.
I know this will seem like the dumbest of questions.

Cheers.