That activation guide explains how you get a key for your il2sturmovik.com user account registration if you have purchased the initial game through Steam.
If you purchased the first part you ever got through Steam, then this guide is required because naturally il2sturmovik.com doesn't know you yet.
Later when you have one part on your PC already (whichever that is, be it BoS, BoM, BoK or BoBo), you can always purchase any additional content from il2sturmovik.com and it will just be there inside your game when you start it ("it's magic"
).
Any additional Steam content you buy, or anything from other resellers, you have to go to the License Key page (
https://il2sturmovik.com/store/license-keys/) and enter the key you got (e.g. from Steam, as outlined in the activation guide) to activate the content in your game.
Summary:
If you buy something from il2sturmovik.com and didn't own any part before: Go to
https://il2sturmovik.com/download/ download the game and install it with your key.
If you buy something from Steam/Resellers and didn't own any part before: Installation will be automatically, for account activation you need to follow the activation guide:
https://forum.il2sturmovik.com/topic/1366-game-key-activation-faq/If you buy something from il2sturmovik.com and already own any BoX part: The content will be activated automatically on next game start.
If you buy something from Steam/Resellers and already own any BoX part: The content will be activated automatically after entering the Steam/Reseller key according to the activation guide:
https://forum.il2sturmovik.com/topic/1366-game-key-activation-faq/Best regards - Mike