Awesome Note (aNote) - No longer available in App Store

When I open my aNote app, sometimes it will update automatically. But last time, I got message like 'App is no longer available in App store'. I had only option to delete the app. I dont know what to do next. Actually I have many important information in that app and I could not open that app to take my information also. Kindly guide me how to take out my data from that app.