From 'Create' button you can import design and colorways with new drag&drop.
Version 3.6: You can import multiple designs in one drop, but design informations needs to be added afterwards.
Version 3.7: You can import single files, but adding design and colorways information such as keywords, customer etc before the importation starts.
When using a simulation combination of different colorways and colors, then the simulation using combination will be used in the print and creating a single page for every colorway. Sample-1 - Coloration 2(More).pdf