The menu options on the File Menu let you:
The Open menu option allows you to open any file whose format is supported by CopyCAD, including point, triangle, image, curve, surface, CopyCAD model and session data. If you are unsure whether a points format is supported by CopyCAD, you can use the Import Points Wizard instead.
The Export Current Model menu option opens sub-menus, that you can use to save the model that is currently selected in the CopyCAD Explorer in different formats. In addition, you can save the curves created or imported for the whole session.
When you import curves into a session, you automatically overwrite any existing curves. Thereafter, curves generated within the model can be appended to the imported curves.