App Crashes (1.7) this is very unstable

This app before constantly prompted for a password ever after I purchased all the songs available. I updated hoping for a fix. The new version 1.7 crashes after 30 seconds on an iphone 4, latest ver. of iOS even after iPhone reboot. This is not a good buy at the moment. Recommend waiting for a fix and watching reviews to confirm stability.

CT is me about ABBA Singbox, v1.7