Once the empty project loads add a 3D Model Control to the screen.
The 3D Model Selection dialog will pop up enabling you can navigate to the 3D model you want to load.
Click on the Import button to select your FBX or OBJ model.
The 3D model is then converted to our .ssg format and placed in a newly created models directory at the root of your project. You can now choose the model to be used in your project.