Restore your backup to fix everything with two or three clicks.
If you aren't making backups, now you know why you should start doing so. Root is very useful but also gives you the power to cause greater damage. You should for instance never delete an app, just rename it so that you can revert changes if you need to.
I have no idea what app you are alluding to. Perhaps someone else will recognize it. Or you could break down and do a search. No doubt if you try a handful of different keywords you would quickly identify the app that you want. It's a good habit to always search before posting a question anyway. Often it gives you an immediate answer. And at the least enables you to pose better informed questions.