Since the release of iOS 7, I've been investigating a problem that causes the app to crash when you try viewing a document. The problem lies within the OS code, and only affects a small percentage of devices, so it has been difficult to troubleshoot. As of today I've figured out what triggers the problem, so I can report it to Apple and add a workaround to the next Set List Maker update. If you're affected by this issue, thanks for your patience!
I submitted the update today:
http://www.arlomedia.com/apps/setlistmaker/support/release_notes.html