Which options are you trying to find? The Custom Edit features are accessible under the Items Editor rollout and the former Creation Tools are now " fully dynamic" > "Added new Distribution modes (available from the Distribution rollup):
• Image, the default mode in previous versions.
• Using Reference objects, by Pivot point or Mesh faces.
• Along a Path.
• From a Particle Flow.
NB Reference and Path modes replace Tree Editor > Creation Tools, which have been removed."
Hope that helps.