Thread:66.87.94.159/@comment-99.10.124.189-20130926165439/@comment-80.29.19.246-20130927155302

I kind of explained it in the "known issues" section, but here it is:

Go to your game directory and in /received/balancefiles/desktop/balance. Open cards.csv with wordpad or similar (easier to save with weird extensions). Replace COMPLETE with COMPLETED in the mahogany entry (it's the only instance of the word, so you can do a search-replace). Save, exit and run the game.

Now the card can be obtained as any other card!