You can click on the 'Edit' tab of your base view and then click on 'Source refresh' button to bring in the new columns to your base view. A formal guide about Source refresh can be found [here](https://community.denodo.com/docs/html/browse/6.0/vdp/administration/creating_views/importing_data_sources_and_creating_base_views/source_refresh).
Then, you can go to your interface view and implement the new columns by adding a new field in the 'Definition' tab and mapping that new field to the updated base view field in the 'Implementation' tab.
More documentation on interface views can be found [here](https://community.denodo.com/docs/html/browse/6.0/vdp/administration/creating_views/creating_derived_views/creating_interface_views) as well.
Hope this helps!