Opening the caproj as a text file (XML) might be a quicker alternative. If you have saved your project as a single file, simply open it as a ZIP file, and you'll find the caproj at the root level.
Inside the XML, check the ID associated with the problematic behavior and which objects or families that still use that particular behavior ID. You could then edit out the behavior from the XML manually but it's generally safer to just reinstall the behavior and do the changes inside Construct.