Turns out the root issue I thought might be the issue, wasn't. The file that may be causing problems would be on the device but you can't get to it without root. And, uninstalling would delete the entire parent directory that it's in anyway, so that file doesn't appear to be the issue either.
Let me give it some thought, and maybe add some debugging code and supply a new version to try.
Just purchased the other night.
Not sure if the above is still expected? Mine still crashes out with a force close if I try and add a new entity on device.