Your not alone, I also purchased Sky Maxx Pro just the other day, I am also experiencing exactly the same problem. I am able to move the slider on the sky colours menu, but when i try to select one of the templates for example red dawn high contrast, i am unable to select it, it wont select with the mouse click, it does not even highlight. All the other sliders work fine. I have multiple monitors x 3 could this be the issue ?
Every other feature works fine, just cant change the sky colours from the default option.
Kind Regards
Chris Kingdom