eshop – paypal button doesn't show credit card option

No. You can either add an image to the checkout page yourself or you can create your own image to replace wp-content/uploads/eshop_files/paypal.png using something like:

function my_icon_paypal() {
	$icon = array(
		'path'=>get_stylesheet_directory(). '/images/mypaypal.png',
		'url'=>get_stylesheet_directory_uri(). '/images/paypal.png'
	);
	return $icon;
}
add_filter('eshop_merchant_img_paypal', 'my_icon_paypal');

to your theme’s functions.php where mypaypal.png is your preferred image uploaded to your theme’s images folder.
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I’ll check that, thanks !