if you get to the 0.1.11a release and are annoyed that you have to manually edit some file to change engines, you can use 0.1.14a of the community edition of the software https://github.com/Engine-Simulator/engine-sim-community-edi...

it is almost the same except has some severe qol improvements.

Ange's top patron is BeamNG, arguably the most physically accurate sim racer out there right now (in some areas, it still needs improvement). I predict within five years BeamNG + engine sim will leapfrog what anyone else has done in this area and recreated what we all thought video games were doing when we were little kids.