As you upload new version of your application you might need to update your flow to accommodate the following changes:
Changes to a screen or its elements:
If you need to capture the screen again, use the record mode. You can set a breakpoint in your test just before the screen you want to update by tapping the blue ribbon. Record mode will execute the test in realtime up to the breakpoint. From that point you can record new screens and actions. Once you're at the point that the screens needed are already in the system, stop the recording and transition back to the editor to finish adapting your test.
Don't forget to rename the screens you added and replace the temporary name given to them by 21. If you want to override any screens just give it the same name and, as you save the test, the screen will be refreshed, not just in your test, but in all other tests.
Changes in the flow:
If the changes in the flow don't include new screens, you can just use the editor to add new screens from your inventory and reorder the order of screens by dragging and dropping them in the right order.
Alternatively you can use the recorder to update your test just as described in this video.
As you save your test, auto-maintenance will kick in and update other tests as well.