Darky's Key Changer would allow you to change it with ease. Else you can edit it in the Registry.
I bought a key from Bohemia Interactive (I was banned on my last one, and intend on staying legit on this one) How do I get the new cd-key from this one, and change it with my banned CD-key(As in does it automatically update it or do I need to swap it), or do I just use the installer bohemia has sent me?
Darky's Key Changer would allow you to change it with ease. Else you can edit it in the Registry.
It doesn't tell me the key though. I mean I re-bought OA from bohemia, and my previous key was from steam (That was banned) will I run into any problems?
You shouldn't but just don't run it through steam to be safe
i did it and no problems.
Use darkies key changer to change the key, and make sure you aren't running through steam or else it will revert back to your original key.