It’s just a hunch, but did that livery have an apostrophe in the directory name?
I’ve had a similar issue which is due to that. See my report: Startup hang caused by apostrophe in scenery name
It’s just a hunch, but did that livery have an apostrophe in the directory name?
I’ve had a similar issue which is due to that. See my report: Startup hang caused by apostrophe in scenery name