It is so weird, when I click on ‘buy pro version’ there is a table with the differences between free and pro and for slider there is a red cross on the option for the slider for the free version. So now I purchased the pro version to get the slider going and it is working immediately. I had the right settings since a long time but never got it to work in the free version. If I had known that I would not have to upgrade. It is really confusing and misleading 🙁