If you need to change the settings for an existing data source without deleting and creating a new one, you can reconfigure it using the "Actions " -> "Edit configuration" button:
Please note that the existing data will be removed and the source will download everything again according to the new configuration. This might take a while, depending on the amount of data.
The reconfigure feature is only available for Google Analytics, Adwords, Facebook Ads, Pinterest, Twitter, LinkedIn Organic, Criteo, Shopify and Snapchat sources at present.