I have checked that the files i purchase are and can be used by DAZ 3D Studio. The files in the Readme file state the you need DAZ Studio 3.1 or higher, i am using DAZ 3D Studio 4.6, the files should work with the version i have. i check and double check before i buy anything, that it would be compatable with what i have, i am just having problems getting the files into the right place or at least working it so i can use the product i ordered.