What, is the source of your copy of SH4... to begin with.???
Amazon, Steam, Ubi... some other web site that sells games, a hard copy aka dick copy... from a bearded lady in a dark seedy alley... (

Sorry, that last was My weird sense of humor cropping up... back Guido... back I tell ya... *sound of whip cracking*)
Most places offer up SH4 in 1 solid format or other... aka version, like... access to v1.4 (or however that 1 is labeled, precisely) or v1.5
Steam, on the other hand... has both available to buy there on their side of things... with having to be ultra careful on which one of those versions you install... if you bought both or got their multi pack of SH aka a 3-n-1 pack... (being SH3, SH4 (both of those mentioned versions of SH4) & finally, SH5.
So...
in short, knowing just where you got it from, is extremely helpful, to know...
M. M.