How to completely uninstall FollowLiker???

I am on macOS. I have tried uninstalling it several times and when I reinstall it still has my previous project settings in it. I want to completely remove it and start from the top. WTH?

What I've done so far:
1) Used AppCleaner to uninstall it.
2) Went to my user folder and found a folder called FollowLiker. In that folder there was an uninstall.app. I uninstalled by using that.
3) Went to Documents and deleted the FollowLiker folder from there.
4) Ran CCleaner.
5) Restarted MacBook.

And when I reinstalled FL then all my accounts are there and all settings and everything.

The reason why I want to uninstall is because it won't let me log in to 2 of my 3 accounts, while I can log in in browser and mobile effortlessly.

Try "~/Library/Application" or "~/Library/Preferences", explore Library folders and you will find what you looking for.