Same problem here (Cannot restore purchase). Also the Edge Extention does not appear to work. Enpass works great on my IOS devices, but has been a real PITA on Windows, and pretty pointless as the extension (In Version 5.x) does not work with Windows Hello, I have to constantly re-type the master password, which kind of defeats the object of the extension).
Really hope these are teething troubles. I am not keen to pay again, as I was on the brink of moving to a competitor until it looked like Hello was going to be properly integrated in version 6.x, (Facetime on my iPhone works brilliantly). As things stand it looks like I would be wasting my money (again).