I just upgraded my SmoothSlider plugin after about a year and my posts weren't showing up. I contacted them via their website and within 5 minutes had an email correspondence going. I had to give them access to my site where they updated something, and everything seemed to be working again. Very good support.
I like this slider a lot, since it's very easy to set up and use, and they keep improving it, making it easier to arrange the order of items, for example.