Cant open to update

Well what worked recently wont now. It is telling me to update and when I hit update it takes me to the App Store and tells me to open the app. Then takes me right back to the download page again. Vicious cycle. Cant use this app anymore until they fix it, unless I move on to another music app.

Renalyssa about Radio Tunes - great music 24/7, v3.0.0