Bug report

Hi!

There is variable name $epofw_admin both in two files extra-product-options-for-woocommerce/includes/class-epofw-front.php and extra-product-options-for-woocommerce/includes/class-epofw-admin.php, it looks like a bug.

Second issue – there is method EPOFW_Front::instance(), so I assume to use it like this

$instance = EPOFW_Front::instance();
    remove_action( 'woocommerce_before_add_to_cart_button', [ $instance, 'epofw_before_add_to_cart_button' ], 10 );

But it does not work because the method not used in the plugin, the instance was created like this
$epofw_admin = new EPOFW_Front();
instead of like this
$epofw_front = EPOFW_Front::instance().
So when I’m trying to get instance of the class for call remove_action() I get another one. Please, fix it.

Thanks.