Jethro is right on as usual. No one is saying you didn't initially go to DVDFab.com (CSS version), but when you inquire about purchasing Fab, the link will take you to DVDFab.net (non-CSS version) which is where you actually make the purchase.
It can get confusing. Both sites are maintained by Fengtao for legal/business reasons.
Never download from DVDFab.net...none of these apps will decrypt.
Always download from DVDFab.com or from cdfreaks (links also maintained by Fengtao). All these apps will decrypt.