Me too, I keep checking my app store about 3 times a day and get all excited when I see the little number of apps that need updating but then realise its not for the WW one
Ok,go to the app, Menu, flick to the second page, about the app, settings then you'll see in preference either Filling & Healthy or Counting, touch it and it then gives you the option to change it - you can only change it for the day you are on same as the online tracker