I also have the 1.0.0.55175 version. There´s no trainer for that.
as expected, I wasted 20 minutes testing this trainer, not to mention 30gb of downloading.
the current trainer(s) work for both of the latest versions of STEAM of this title.
the way I get the version number is to go here:
C:\Steam\steamapps\common\XCom-Enemy-Unknown\XEW\Binaries\Win32
right click on
XComEW.exe
click DETAILS
and note File Version
I see no other place in the game showing any other version number?
this is LEGIT STEAM version, fresh install..
I am uninstalling the game to make more room again on my HD.
this game hasn't patched since 2013..
best,
Cal