1. Launch and sign in to the app if you have not done so.
2.  While in the app, tap the navigation button.
3. Tap Periods and Goals.
4. Tap on the relevant period.
5. Tap Manage Goals.
6. Tap on the goal you wish to edit.
7. Tap Edit Goal.
8. This should launch the goal editor.
9. Make the necessary edits.
10. When you are done, tap apply.
11. Your goal list should now be updated with your updated goal.