Error when installing LiveView Plugin

When trying to install LiveView to Titanium Studio, I get this error:

Cannot complete the install because one or more required items could not be found.
  Software being installed: LiveView Feature 1.0.0.201307021617-3--59H5F8B9F9 (com.appcelerator.titanium.liveview.feature.feature.group 1.0.0.201307021617-3--59H5F8B9F9)
  Missing requirement: LiveView Feature 1.0.0.201307021617-3--59H5F8B9F9 (com.appcelerator.titanium.liveview.feature.feature.group 1.0.0.201307021617-3--59H5F8B9F9) requires 'com.appcelerator.titanium.360.core 0.0.0' but it could not be found

Titanium Studio, build: 3.1.1.201306112235, Mac OS X 10.8.4