Hi @kyotomizuko,

You can disable the Website and About Me fields using this script:

function my_custom_wpforo_account_fields( $fields ){
    $remove_fields = array('site', 'about');
    if( !empty($fields) ){
        foreach( $fields as $r => $rows ){
            foreach( $rows as $c => $cols ){
                foreach( $cols as $f => $field ){
                    if( $field && in_array($field, $remove_fields) ){
                        unset($fields[$r][$c][$f]);
                    }
                }
            }
        }
    }
    return $fields;
}
add_filter( 'wpforo_get_account_fields', 'my_custom_wpforo_account_fields');

Put this code in current active WordPress theme functions.php file.

How to Easily Add Custom Code in WordPress (without Breaking Your Site)