Hi Matthew!
Thanks for your kind message and apologies for the incredibly delayed reply. Your email came about 3 days before my family moved across the states, so it got lost in the shuffle.
The recordings are stored within the app's documents directory, which is accessible via iTunes file sharing. More info on how to use file sharing
here. Any "scene" folders you create are also stored there.
Due to Apple's "sandboxing" of apps (each app has it's own file system as a security measure), the files are directly associated with an app. When you delete any apps, you automatically delete all files stored by that app. So - the bad news, as I'm sure you know by now, is that the files cannot be recovered. Sorry about that!
Always best to take a backup of the documents directory (see the file sharing article I linked) before deleting an app that stores data.
Sorry again for the long overdue reply!
All the best,
Chris