This Project Wizard screen lets you select how the images for each epoch in a type 2 project are to be identified. The options are: a) each epoch’s images are in a sub-folder, in this case each epoch has a separate folder that contains the images used for it; b) the images use the same naming scheme as type 1 projects do: "AAAATTTT.jpg" where AAAA is an identifier that is unique within the epoch TTTT is the epoch number and jpg is the image format extension.
Once the image type is selected use the browse button to select the root directory where the images or sub-folders are located.