Profile: Support

You can add only suffix for URL (example ?affiliate=1).
and your product URL will have such URL
http://www.foxnetsoft.com/productname?affiliate=1

How do you add suffix?
Open feed and select the second Tab, find the URL tag and press 'Edit'.

<ActionId>0</ActionId>

Check "Post-process action" value.
Try to set value 'none' (or 0 in XML template).
You use 'decode_html_entity' and plugin removes all html tags.

Yes. You can select receiver's email address from the list.

If customer presses the button 'Buy' plugin adds the product into the basket.
NopCommerce checks the stock and product attribute warnings.
If you have another products in the cart you will see all products from the cart in PayPal express checkout page.

You should put serial number on plugin configure page.
Our robot will send it after purchase.

Download new release from our site. We have fixed this bug.

Version: 1.06

Try and write me about result.

Open the file _ColumnsTwo.cshtml in the theme folder.
And add the next code.

1. After this code

    var isHelpDeskPage = currentController.Equals("helpdesk", StringComparison.InvariantCultureIgnoreCase);

    var isProductRewardsPage = currentController.Equals("productrewards", StringComparison.InvariantCultureIgnoreCase);

    isCustomerAccountPage = isCustomerAccountPage || isOrderListPage || isReturnRequest || isBackInStockSubscriptions || isRewardPoints || isForumSubscriptions || isMyProductReviews || isVendorInfo || isHelpDeskPage;

    isCustomerAccountPage = isCustomerAccountPage || isOrderListPage || isReturnRequest || isBackInStockSubscriptions || isRewardPoints || isForumSubscriptions || isMyProductReviews || isVendorInfo || isHelpDeskPage || isProductRewardsPage;

I answered you by e-mail. Can you check store setting (Url, SecureUrl and hosts)?

PayPal express doesn't allow to send shipment method.
PayPal recommends to use internal PayPal shipment method mapping (you can set shipment fee).
You can create shipment method and fee in PayPal admin mode.
https://developer.paypal.com/docs/classic/admin/checkout-settings/#auto-calculate-shipping-charges

About error.
1. Do you use the last release from our site?
2. What NopCommerce version do you use?
3. Can clear cache in browser and try again?