How to update existing cards not clearly explained in the Help
I discovered that the import uses the GUID field in the import file to find existing cards. I did not see this information in the Help file (I was trying to use Title, Id in the Excel file or Unique ID from the card properties to figure out what the tool was matching on).
So I had to first export the cards I wanted to update, then make my changes to the export file (with the GUID column filled in) and import the updated export file. These steps are not clearly explained in the Help. Can you add this detail to the Help?

Hi Elisa,
We have updated the online help with the content mentioned.Please refer the below link for updated help content:
http://help.swiftkanban.com/getting-started/projects/cards/export-and-import-cards.html#adding and updating cards
SwiftKanban Support