Seems to be ok by judging your 1st shot.
Your SIM folder should contain 57 files + SAVE folder with 44 files.
You can further check that you have all features of the game by:
- In historical missions, there should be missions with type XXI u-boat, plus missions that take place in the Mediterranean Sea.
- In-game go to your Watch Officer menu and fire-up the 2nd last order, this should show you Air Pressure Level + Flooding Level (water level).
- In the single missions, the type XXI u-boat is selectable and playable.
- Single missions and campaign (patrol) missions can now be saved in open sea when going in the CTRL-O menu.
If you have all this, then all is OK I would say
I wish you a good hunting and a lot of fun with AOD
P.S: I have played recently, but found no traffic in the Med Sea during a campaign, I may be there at the wrong time, but possibly only the single missions will feature traffic in the Med Sea, a little drawback but we have to live with it...