Till version 2.2, SS was using another JavaScript but because of some licensing issue raised by WordPress, they needed to change the same. Now SS 2.3+ is using another Script for sliding the content. If you are upgrading to the new version from 2.2 or previous version, try following steps.
– Deactivate the plugin
– Upgrade to the latest version
– Activate the plugin
– Go to “Smooth Slider” settings page and click on “Save” button (at bottom of the page)
– Recheck whether “Smooth Slider Styles to Use on Other than Post/Pages” on settings page is set to “default”
– Save the changes
After that you can customize the plugin as per your need or change the stylesheet from default.