Is Costco Photo Organizer activated and functioning on Windows?
No, the software doesn't appear to be available for usage on Windows. It was available for a limited time, but I see they've replaced it with a mobile app, that doesn't work as well. I've tried to access the link and an error popped instead. However, the application might be available for customers, therefore login with your username and password on the official website: http://www.costcophotocenter.com/Help#/topic/contact-a-customer-service-agent-now
