Please do the following steps to Backup your iPad with iTunes and Restore the ipad back to Factory Settings. And then restore from Backup.
First backup your iPad with iTunes. Connect your iPad to computer. Open iTunes. Let iTunes sync with your ipad. If backup started, let it backup and wait until that is done.
Select iPad. Under Summary, go to Backups section. Select This Computer option. Then click Backup Now. See photo.
This will backup your iPad data such as contacts, messages, photos, videos, apps, and more.
Once done, we click Restore button. This will restore your iPad back to Factory Settings. If there is an update for your iPad, iTunes will download and update. It will take 30-60 minutes or more based on your internet connection.
After restored, activate your iPad. Then click Restore Backup button under Backups section. Select the Backup that we just did. Then your iPad should be working normally.
Download the app or update it. Try to scan the business checks. See if it will work after this Restore.
If still not working, we will have to manually restore iOS 6.1.3 on your ipad 2.