In order to use SDL Language Cloud Machine Translation you can activate it from Project Settings - > Translation Memory and Automated Translation -> Use -> SDL Language Cloud Machine Translation.
2. In the Settings you can select what Engines to use: Baseline, Industry Engine or Adaptive.
3. Make sure that SDL Language Cloud Machine Translation is Enabled and Update check boxes are ticked.
Update only applies for AdaptiveMT in order for the LC Adaptive engine to learn from your translations.