I’m sorry to hear that. As mentioned in my reply to your support topic, there wasn’t much else we could do to alert users. Unfortunately we have to work with what we are given with WordPress and out best option was to display alerts within the plugin itself and on our website. The best that could be done unfortunately.
As for changing the class names, this was all just part of the development process. Easing Slider v1.2.1 was function based, Easing Slider “Lite” v2.0 is class based (and much better coded), so there was always going to be some major differences. That said, all of the older functions and shortcodes for displaying slideshows were included and should have still worked fine.
Anyway, again I’m sorry for the inconvenience caused. My sincere apologies.