① Go to your Facebook 'Settings'.
② Click 'Apps' on your left.
③ Find 'Cupix' and remove it.
④ Click 'Remove' in the pop-up window.
⑤ Visit Cupix 'Sign In' page and click 'Sign in with Facebook'
⑥ Click 'Edit This' in the pop-up window
⑦ Make sure Email address is 'checked'so that your email address is provided to Cupix for signing in.
⑧ Then click 'Continue as (your name)'.