Under Manage Exported Events, you can see which events are being exported and where they are exported to.
To edit an exported event, click Export Options > Edit Platforms for the specific event. Note that changing the Display Name/Label will create a new event in the account.
To stop exporting an event, click Export Options > Stop Exporting behind the specific event. You will still see the event in the accounts you’ve previously exported it to, but it will no longer be updated.