Header Image

Hi, I have some questions: 1. if I buy this theme, is it possible to change/revert to another theme of yours (I like this, but I am not 100% between this and another one)? 2. with the "pro" theme can I arrange the home Header Image? Indeed in the pages, I can see the header image responsive, but in the home page, the behaviour is not so "fluid"... www.quartouomo.it