CRASH - The application exited abnormally with code (c0000005)

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Trainyard/version 23549. crashed to launcher with the following error:
The application exited abnormally with code (c0000005)

edit: launch.log exceeding attachment size, and too large to post as

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here’s a hopefully kosher link to a trimmed version (170 kb instead of 10.8 mb) of launch.log:
https://www.dropbox.com/s/eqoilu7vodmwdx6/Launch.log-trimmed.zip

i removed … a couple of… lines worth of the following:

[xxxx.xx] Warning: Warning, Failed to load 'PostProcessChain Post_Process.PPC_Default': Failed to find object 'PostProcessChain Post_Process.PPC_Default'