You can download a free version of this s/w with some of its functionality disabled. To get full use from this s/w you need to register and pay for it(19.99 dollars us). There are links on the site where there are over 2500 skins available for free download.
As I understand it there isn't a time limit on the length of time that you have the freeware trial version(I couldn't see anything in the licence agreement to indicate that there is a time limit).
I've downloaded it to try it out and if I come across any problems I'll update this thread.