You need to:
- Click/Tap on "My Accounts".
- Click/Tap on "View" (on the Account which you wish to have the password reset).
- Click/Tap on "Actions".
- Click/Tap on "Copy password" and the password will automatically reset. Click "Copy Password" after had paste the password somewhere safe.
- Proceed to also change the password on your MetaTrader installation be it desktop or mobile application.
If you click change password and click somewhere else without copying the password, you will need to go through the process again.