Don't worry if your Messenger gets update, If you lose your timeline.
We have solution for this problem from which you will able to get "timeline" with "My Story" on update of your messenger. Solution is our app through which you will get your timeline back.
This app provides a option for -
1) Accessing timeline directly from the app.
2) Adding shortcut on home screen.
3) Adding a notification in status bar.
From this three ways , you will be able to access your messenger's timeline even though your messenger is updated.