Visualising SQL queries in datamart - how to update the visualisation once the query's been edited

[JeremyCoward]

I've started using the PowerBI Datamart to run SQL queries and visualise the results. I've saved these visualisations as reports. 

I've since edited the underlying query to add/edit some fields. Now, when I go to edit the visualisations fed by this query, the available data doesn't reflect these changes. Only the old fields from my original query are available. 

Is it possible to refresh the data behind these visualisations, so I can edit them using the latest data from my SQL query?

Thanks for the help!