After a connector has been added to a spreadsheet, the connector can be run again at any time. The Blockspring plugin shows all connectors that have been added to a spreadsheet.
In Google Sheets, this is in the top toolbar under "Add-ons". In Excel, this is in the top toolbar under "Blockspring". Log-in to Blockspring if needed.
When you open the Blockspring plugin, you will see a list of all connectors added to the spreadsheet. Click the blue "Run" button in a connector's card to run it.