MFTExpress is currently down. Amazon's EC2 services which MFTExpress depend upon has suffered a massive outage affecting a large number of companies and services including MFT Express.
We apologize for any inconvenience. At this time we are working with Amazon to correct the issue. This is a priority and we will continue to actively work on the issue until there is a resolution.
For additional information on this outage please see the following article.
Please visit the Amazon site for the latest updates on the status of this issue. The datacenter currently affected is Amazon Elastic Compute Cloud (N. Virginia).