When forms need re-exporting, this can be done by going into the case and selecting the Export Logs tab.
Forms can be re-exported for all current cases and archived cases up to 12 months old.
In this example, one of the exports has reported an error:
To the right of screen is the Actions button:
Select the files you wish to re-export, and Confirm:
The Export will be Queued:
And shortly a confirmation message will be displayed: