Uninstall / Reinstall
If you you are seeing a blank screen like the one here, then most likely it was due to an error with the way the app handled a recent update.
So far, the only way that we have figured out how to recover is just to uninstall / reinstall.
Once you uninstall, you can reinstall in the App Store here:
If you are still seeing the blank screen after reinstalling or if you have any other questions, please send us an email at firstname.lastname@example.org .