The Achilles reports are located under the 'Datasources' on the left nav in Atlas.
When you go to Datasources, you're presented with a list of sources which is configured via the WebAPI source and source_daimon tables.
You are still required to execute the achilles() packages which generates the summary statistics that are used in the Datasources module of Atlas. Just ensure that you generate the results into the same schema that you specified in your source_daimon's 'result' daimon table qualifier.
You no longer need to exportToJson, or specify a 'datasourcesLocation' or datasourcesRoot config variable (as of v2.2.0). The report data is queried directly via WebAPI.