In the top menu, click on ‘View’ and then left-click on ‘Navigator’
The Navigator window should open.
You can also toggle the Navigator window on and off using CTRL + N
In the Navigator window, you should see your account.
Right-click on your account and then left-click on 'Change password'.
You will then need to put in your Current Password, and then enter your new password and confirm it.
Then click on OK and your password will be changed.