In case you want to change your password you can do this inside the App by simple steps:
- make sure you are inside the app and signed in
- click to 'edit profile menu' which can be found on bottom part of the app
- then enter a new password and verify it
- press 'Change' button to confirm
That is it.
Here you can see how the Edit Profile Menu looks like inside the browser App:
You may also be able to change your default language inside the same area.