In version 3.4.3 released yesterday, the recording playback is causing crashes on iOS 5, which includes all iPad 1 devices. I've made a fix and as soon as I can get this tested on an iPad 1, I'll submit it to Apple. If you need to play recordings on an iPad 1 and haven't installed 3.4.3 yet, please wait for version 3.4.4 coming soon.