Laminar released the current stable version of X-Plane 12.4.1 today on which the current version 1.8 of HotStart Challenger 650 crashes with the error "Threading violation calling XPLMGetDatad".
Loading the TorqueSim SR-22 crashes with the same error.
The release notes of X-Plane even state the issue.
I hope this gets fixed soon as there is no way of getting an older X-Plane version on new installations.