In-app purchase cannot be restored

When functioning, the app works well. I liked having countdowns in notification center. But, when I installed on a new machine, I was unable to restore the in-app purchase. I tried to contact the developer and got no response. From other reviews and the developer web site I see this is a known issue. Its not too expensive at $0.99, but still, it is very unprofessional to leave an app in the store with this level of broken functionality for so long.

rakingleaves about Countdowns - with Widget