If you are using the SDK for the first time follow the following articles in sequence
11 articles
Download frontline.io 3D Studio
frontline.io 3D Studio - PreRequisite Unity Application
Installing Unity
Creating a Unity Project
Login to the frontline.io 3D Studio
Importing your 3d model
Importing frontline.io 3D Studio
Supported formats
Converting CAD Files to frontline.io Models
Content Creation with frontline.io
Installing and Updating the frontline.io 3D Studio (SDK) in Unity