I have updated the app but the previously purchased In App items do not work.
Please RESTORE the items when you want to use previously purchased In App items.
If you RESTORE, previously purchased items can be downloaded for free.
1. Tap ‘Shop’ button from the main screen.
2. Tap ‘Restroe’ button on top left.
3. Sign in with the same account that you used to initially purchase the items.
4. All your previously purchased items will be downloaded again.