Crashes Right After It Launches

This used to be my favorite app while jogging. Ive recommended it to soooo many people. Now when I launch the app on my iPod Touch (iOS 5.1.1) it opens to the Interval Run title page then shuts down. Ive deleted & reinstalled - same thing happens. This needs to be fixed!

Droptop_ATL about Interval Run, v1.8.1