Short answer
You can change your password from the Settings screen without entering your current one.
Full explanation
To change your password:
Click your profile name or icon in the bottom-left corner of the AskTuring screen.
Select Settings from the menu.
Under General Settings, click Edit next to your name.
Enter your new password in the New Password field.
Re-enter it in the Confirm New Password field.
Click Save changes to apply your new password immediately.
You will use the new password the next time you sign in.
Tips
Use at least 8 characters with a mix of letters, numbers, and symbols.
Avoid reusing passwords from other accounts.
If you forget your password, you can reset it from the sign-in page using the Forgot password link.