With todays Steam sale on the Shadowfell expansion pack (it was 75% off on Steam today), I was gifted a copy and I am wondering if anyone knows how to get the key from Steam and apply it to my DDO account?

My account is not a Steam account, it's a regular Turbine account. I do not currently have DDO on Steam and DDO is not listed in my list of non-Steam games, despite it being installed on the PC that I am using.

Any suggestions would be appreciated.

Id.