ARMA OA CD KEY Whit the Dlc's Windows 8.1 Problem

[Ferni50]

The key i bougth was from steam, in other account, so i use the cd on my banned oa steam account, that have the dlc's i bougth.
idk if i explain it ?

THAT FIXED MY PROBLEM , thankyou so much.
And the answer is:

Just a way how i did this:

Actually i have non-steam version of game, but i think there is the same solution:

You bought new key -> Changed it through Darky Ban checker\CD-key Changer v.1.1 so, after this DLC's cannot be loaded when you launch the game (decryption headers failed errors), so just uninstall DLC's (RFT = BAF+PMC) -> just install them again using installer of these DLC's -> installer ask you that you need put a key\keys for them -> using keygen for that, do it -> you've done.