To find what version of the app you’re on:
1) Click your profile logo found on the top right corner.
2) You will be able to see the version of the app you’re using.
If you aren't using the latest version, there are two ways to update the app:
1) Go to the app store and click [Update]
In case you’re using an older version and don’t see this option, you’ll need to uninstall and re-install the app.
2) Accept in-app OTA updates
When you receive an OTA update and accept it, you’ll need to wait a few seconds for the app to update and restart on its own.