Welcome back copaup and Double R (been wondering where you've been?).
I originally used Direct2Drive to download my "U-Boat Missions, patch 1.5" and had all kinds of trouble getting the game to recognize my authentication number after a specific amount of time passed. I'd have to call Customer Support to have them "reset" my authentication key and try again.....it worked every time, but it was a hassle each time to get something you paid for to work as expected.
D2D was sold some time ago. To my thinking, getting the new owners to look up my old account was just not worth the trouble either.......I bought a DVD copy of SH4 Gold Edition for under $8.00 from
iNetVideo....took all of three days to come to the house!? The price has gone up from a year ago.....but so has a gallon of milk.
Some of the other community members have said the Steam download of SH4 is version 1.3......you can update to version 1.5 at an extra additional cost. To me, this smells like yesterday's fish.......get the DVD!.