You can import a number of different 3D file formats into KeyShot. You can edit the Import Settings in Preferences where you also can opt out of the Quick Import again. In the bottom left corner of the Import dialog you have the option Enable Quick Import. This will allow you to skip the Import Dialog on import, using on of the first 4 methods – Main Menu > File > Import Dialog… will still show the Dialog. The first time you import using any of the supported formats, the Import Dialog will appear. via the Main Menu > File > Import Dialog….via the hotkey combination Ctrl+I/Cmd+I.
You can import models into KeyShot in several ways: