I eventually figured it out .. I once again uninstalled EFT (like i tried earlier) but the difference this time was that I also deleted the BSG game folder and it's content (Both BSGLAUNCHER and EFT folder + their content)
- Re-installed the full game again.
- Updated the game to newest version
- Launced the game once to confirm it worked properly
- Restarted the computer
- Ran the downgrade patcher (to 12.11.7.15680)
- Copied in the AKI version 2.1.2 files (Overwrote when promted)
- Ran Server (Waited for confirmation)
- Ran Lancher
- Created new account and clicked "Start game"
- And It finally worked