Compatibility levels explained
From KernelEx Wiki
Application compatibility with KernelEx is denoted using one of five compatibility levels.
Crashes or hangs immediatelly not allowing to perform any useful actions.
Major functionality issues, system crashes can occur.
Main functionality usually works properly, some features don't work. Might crash or hang occasionally.
Main functionality works stable and properly allowing regular usage, less often used features might not work as desired or lead to crashes.
There are no known bugs, application works as designed by the author.