If you are experiencing crashes on Decked Drafter with the latest update, please email us at email@example.com. We are trying to track the issue down, and have a fix in testing as well.
For a quick fix if you absolutely cannot restart the app, just reload it from the App Store. To restore your sets, just select "Restore Purchases" from the settings page. Head over to our FAQ to learn more about it.
Sorry for the inconvenience, we hope to have this resolved soon.