Corrupt Workshop scenarios

After I unsubscribed from all Workshop items and did a clean re-install of Railworks, I am slowly rebuilding a Workshop collection.
Starting with Elphaba, I subscribed to his scenarios.
However, upon starting the clean Railworks and having the Workshop files downloaded and decompressed, LogMate.exe again shows corrupted files, as does NameMyRoute.exe.
Railworks crashed a few times while downloading w/o an error box even, before finally showing the Profile page.
Deleting the scenarios from Railworks and having them downloaded and decompressed again still showed many corrupt.
Even after clearing the Steam cache under ugc/referenced, forcing a fresh retrieval from the Steam servers.
What am I doing wrong? How can I get out of this endless loop?
Starting with Elphaba, I subscribed to his scenarios.
However, upon starting the clean Railworks and having the Workshop files downloaded and decompressed, LogMate.exe again shows corrupted files, as does NameMyRoute.exe.

Railworks crashed a few times while downloading w/o an error box even, before finally showing the Profile page.
Deleting the scenarios from Railworks and having them downloaded and decompressed again still showed many corrupt.
Even after clearing the Steam cache under ugc/referenced, forcing a fresh retrieval from the Steam servers.
What am I doing wrong? How can I get out of this endless loop?