Pre sales question

I am interested in your AS 002061 template and the AS Art Sliderslider. Especially the latter. Does this extension creates the effect in the template AS 002061 template? If so, does it work in all templates or only your own templates?

I understand your policy regarding the usage. Of course I will pay per domain I intend to use it on. But I very often use paid extensions in WAMP on my own PC to get familiar with them. Can I use that extension free in WAMP or does this policy also applies to my PC? I try things out, delete the whole site and try it again (if it doesn't work, of course.)