Some of your custom browsers may not be converted to the Query Builder format. Browsers that have complex filters, unions, or sub-queries are not converted. You should save your data and recreate the browser using the new Query Builder and EDE. Invisible attributes used in the Sort process in a browser are not included in the query/EDE. Invisible attributes that were part of a Filter in the browser are added to the query/EDE, but as visible attributes.
Not all properties that were editable in previous versions of the software, when upgraded to 2016, are editable. Some properties become Read Only. While other properties that were Read Only become editable.