1 - Go to your Supreme Commander Forged Alliance folder ( where you have it installed ). if u have Steam version should be in this location:
C:\Program Files (x86)\Steam\steamapps\common\Supreme Commander Forged Alliance
2 - Select all content inside the "bin" folder , copy it.
3 - Go to "C:\ProgramData\FAForever\bin" and Paste all the content you have copied from FA forder. if appear a window asking for overwrite existing file select "copy and replace".
4 - Go to "C:\ProgramData\FAForever\lua" folder, copy all content ( there should be 7 files ), and paste on :
"C:\ProgramData\FAForever\bin". A window Will appear asking for overwrite the existing files select "copy and Replace"
5 - Enjoy! =)
The problem I had with this one is that my lua folder didn't have any files in it so I couldn't copy any over. I've also tried reinstalling and clearing the Game Files. I would post my forever.log, but it said my post looked to spammy for a new user. Any help would be appreciated, thanks.