Missing gamedata in Steam version (S.T.A.L.K.E.R.: Shadow of Chernobyl)

Good time of day.

There is no gamedata folder in the directory of the Stim Shadow of Chernobyl.
Tried and ready folder to insert from the Internet (ended with a black screen and departures), and unpack the files gamedata.db (...) - the unpacker issued an error (as it turned out, with the steam version of this procedure does not fall).

Is there a solution?