Marketpress isn't sending download links or processing payments

I tried the community but this hasn't been resolved. I have updated to latest update and now my clients do not get emails with download links. On top of that, they are getting to the Order Completed screen but their payments are going through and needless to say they are not getting download links in their order status. I have personally tried to order myself and experienced the same problem.

We just launched a new product and now this is a nightmare! Please help