I never log on my wordpress account here, but today I did .. just to make sure these guys are getting a 1 star rating extra from an unsatisfied user.
To make a slide you first have to download and install their crappy app on your pc (Why not via wordpress?), of course after giving them your email address so they can spam you with stuff you're probably not interested in.
Not even going to mention that annoying Wowslider.com credit line on the bottom that isn't removable unless you pay for a premium or whatever service. (Oh, I guess I just did mention it :))