Indeed the Lotto Hat application doesn't exist anymore, primarily because the official website has been discontinued as well. The default page is displayed when you want to access it.
Also, I've extended my search and found out that the software wasn't trusted by its users due to the fact that it had no accuracy with the given results. I recommend you try something else.
Use the following link to access a list with some lotto-related applications: http://software.informer.com/search/lotto
Note: The list contains Lotto Hat as well, therefore ignore it.