I think I have a fix - it worked for friend and I....
1. Go to the bigpoint page where it would normally display "your" games.
2. Go to Strategy Games and get the list displayed on the screen that shows several rows of games. Make sure it is the list that has options for Detail & Play now on the right hand side for each game.
3. Scroll down to you see DoE. Click Play now. You should get the DoE screen.
NOTE: This does did not add the game to the bigpoint portal for me. I (and maybe you) will need to do the steps above from now on to play DoE until they fix it.