UPDATE TO 1.0.9

So, it was logic bug.
Decision:
– go to index.php
– find function raw_woocommerce_price
– comment code if ($this->is_multiple_allowed)

public function raw_woocommerce_price($price)
    {
        //https://codex.wordpress.org/Function_Reference/is_admin
        //$is_admin = (bool) substr_count($_SERVER['REQUEST_URI'], 'wp-admin');
        $currencies = $this->get_currencies();

        //if ($this->is_multiple_allowed)
        {
            if ($this->current_currency != $this->default_currency)
            {
                $price = number_format($price * $currencies[$this->current_currency]['rate'], 2, $this->decimal_sep, '');
            }
        }

        //***
        if ($this->current_currency == 'JPY')
        {
            $price = number_format(floatval($price), 0, '.', '');
        }

        return $price;

        //return round ( $price , 0 ,PHP_ROUND_HALF_EVEN );
        //return number_format ($price, 2, $this->decimal_sep, $this->thousands_sep);
    }

+
in public function __construct() add next filters:
add_filter(‘woocommerce_get_sale_price’, array($this, ‘raw_woocommerce_price’), 9999);
add_filter(‘woocommerce_get_variation_regular_price’, array($this, ‘raw_woocommerce_price’), 9999);
add_filter(‘woocommerce_get_variation_sale_price’, array($this, ‘raw_woocommerce_price’), 9999);

Update will be today …