Hello,
I copied the scripts from https://sourceforge.net/p/supertuxkart/code/HEAD/tree/media/trunk/blender_28/ to C:\Users\myName\AppData\Roaming\Blender Foundation\Blender\2.80\scripts\addons
They show up in the preferences tab in Blender but with the message "upgrade to 2.8X is requiered".
What should I do?