Dear Louis, might be that time has blurred your memory: you did not offer me a free dev set up, I had to provide a dev site in order to give you the possibility to update your one step check out to last CS CART update.
Maybe because your are not a native English speaker, you didn't get that we did try to offer a free dev setup for you. You refused and canceled the support service. Thank you very much for liking our addon. It's really a pity and hope next time you will understand other people's offer.