The bug causes accounts of paid apps to be removed when Android boots up. To work around this issue this app pretends to provide the same account type that Enhanced Email provides. That's enough to convince Android to keep the account. That's all this app does.
On some devices you'll have to install this app before you install Enhanced Email. Please try that if you still have problems.
Please note that the bug is in Android, not in Enhanced Email!
If you're not using Enhanced Email on Jelly Bean, you don't need this app. There is no need to give it a bad rating in that case! Please don't install it in that case.