First the XHTML app must be activated:
1.a Go to Manage>Apps
1.b Click Activate under XHTML ExportOnce the XHTML app is activated, you can choose to export all your generated data to create an offline archive by following these steps:
Go to Manage>Exports
Click the + Create XHTML export at the top of the page to start a new export. You can continue navigating through Labfolder while your new file is downloading and a notification will appear once the export file is ready.
Click the notification bell and select the notification message. This will direct you to the Exports page.
Any exports from the last 48 hours will appear here. Clicking the Download link will allow you to download a zip file containing the archived export.