I just installed the latest version of the iBus App 2.1.1 and it appears to be running fine.
They have added coding for LED tail lights (not sure what that will do but I have LEDs so I activated it)
Here is the link to the iBus hardware interface
Resler IBUS Interface
The "license" to open up the features is sold separately
https://shop.ibus-app.de/en/shop/
The latest version of the App is here
http://ibus-app.de/ccount/click.php?id=download
Enjoy,
Mike