Pre order code invalid

[WintersMoondancer]

So since i bought my game via steam, i cant use a non steam registration code for my version?

That is correct, once you use Steam, you must purchase the updates/expansion packs through Steam too.

The 20 digit Pre-Order code for the Heavansward expansion will work for the Service it was purchased for. If you pre-ordered a Windows copy of the Heavansward Expansion and the Steam version is registered to the account, neither the Standard Windows Heavansward Pre-Order code nor the Standard Windows Heavansward Expansion that was pre-ordered can be redeemed to the account.