Slider is gone after installing WP Speed of light

Hi,

I've just purchased the WP Speed of Light addon last Friday and after installing it, our homepage slider (crelly slider) is gone since then. I didn't update or change any setting with the slider addon so I think it's related to installment of WP Speed of Light.
Any ideas how to solve this? Or do you maybe suggest any other and better slider addon? (free, preferably)

website: http://www.metropolsoft.com

Thanks in advance and happy new year!