A. To edit categories, go to the 'My Cards' section and select the card you want to edit. Look for an option to edit or manage categories. If you cannot find this option, try updating the app to the latest version, as category management features may have been added in recent updates.

B. As a workaround, you can create new cards with the desired categories and delete the old ones. This is not ideal but can help you organize your contacts until the editing feature is available.