Menu: Debug -> Export DataTips.; Debug -> Import DataTips
Command: Debug.ExportDataTips.; Debug.ImportDataTips
If you have DataTips (pinned or floating) you can import and export them! How? Just go to Debug -> Import (or Export) DataTips.
When you export the DataTips they are exported as XML so you can use PowerShell script to change them all or make some other modification if you need to.