Just a warning to everybody, rp3wn correctly entitles this as EXPERIMENTAL. Listen to that, as I did not.
As ScreenMirroring was broken on my Note 10.1 2014 after root, I attempted to restore this feature via this app, but to no avail. I then activated the two other options in the app and rebooted, and now my device hangs after the Samsung animation with just the logo on the screen.
As I understand it, I will need to try to try to get a stock rom for the device and flash that via odin, and I'm sure I can find some instructions for this on the net, but now I'm just dreading trying to find a rom-image for my device (no way to know what was on it exactly before) and then having to re-install everything...
If I missed a better/simpler way of restoring functionality to my device, I'm all ears and very grateful for any pointers in the right direction.
rp3wn, please, add a list of devices which are known to brick in certain situations, as I read at least a Tab S has also bricked, had I read that (page 180 or so of the thread) I would not have touched this.