So, for some reason, my laptop currently cannot access steam for some unknown reason, however I found a cd copy of "Railworks" on Ebay, which for those unaware is what TSC used to be called, if I get it, will it update to TSC?
If you install the game from a CD then it needs to go on to Steam to update. And a second hand Railworks cd is likely to have had the code used which cannot be used again