There are no folding instructions in this ARD file.
Option A: Go backwards
Get a new ARD file with folding instructions from your CAD software or whomever provided you the ARD file.
Option B: Work with what you have
Click the drop down menu in the upper right of the studio window and choose "Fold ArtiosCAD file.." Be sure to "go back" to the beginning, set the base panel, set the substrate and then get to folding those angles manually.
My shop uses Arden Impact and we setup our own ARD files within Studio from A PDF they give us out of Impact. It sucks but it's saved us a number of times.