I don't have any specific info, but when they first opened I had my doubts that they would last very long. They made a lot of rookie small business mistakes, like blowing a ton of money on decorating and buying brand new expensive equipment (I couldn't believe they had a brand new shiny Point-of-Sale computer system when you can get them sooooo much cheaper used from failed/closing restaurants), their menu was way too huge (when they first opened they must have had 30 different named sandwiches), and the prices didn't seem to reflect the kind of markup you'd need to support their expenses.
That might not be it, but I'd guess it's just another failed restaurant due to market conditions and inexperience.
They have a business license and are paying rent and doing business. I can't go in there and get a sandwich like before, but I can go in there and book a banquet if I wanted. If they are receiving money from customers for a service, it would be hard to consider them closed.
If you want to get really technical you could say the old Donna's that was a sandwich joint closed, and a new business that does banquets opened. In the end it becomes a wash from the counter's perspective.