After purchasing the eCommerce plug-in and having it work for a couple of years, a while back the USPS shipping calculator stopped working. First it stopped offering some of the shipping options to customers and eventually no USPS methods were available to customers. I assume this was because the add-on was not responding to changes that USPS made to their shipping fee tables. I was prompted by c5 to update the eCommerce USPS add on but when I tried to install it I received a message that it could not be found on c5 website. Screen shot should be attached. I need this add on to work again.