From the Autodesk BIM Interoperability Tools website:
Model Checker
General
1. The nomenclature and naming of elements in the Model Checker were thoroughly reviewed and updated to try to avoid confusion between the tools and Revit and to make understanding the structure of checkset easier.
2. Updated user interface elements and layout have been applied for ease and consistency.
3. The help fly-outs have new links to multiple resources and are accessible on all the tool’s windows.
