So I got a reply from Support, thought I would share:
This functionality was changed in TestComplete 9.30. In this version of the tool, the Extended Find field in the Name Mapping editor is just an indicator showing whether the option is enabled for the mapped object or not. You can enable/disable the extended search criteria for a mapped object only in the "Edit Name Mapping Item" dialog (to open it, double-click the needed object in the Name Mapping tree).If you still need to use the feature as it was in TestComplete 9.20, I recommend that you update to the latest version of TestComplete - v. 9.31. This version allows selecting the check box straight in the Extended Find column, but you will have to reaffirm the action in the confirmation dialog. Please see the "Using Extended Search Criteria for Mapped Object Identification" help topic of TestComplete 9.31 for details:http://support.smartbear.com/viewarticle/29351/
