I get this on the startup screen:

"Login failed.  You may have missing or stale registry data.  Try running Fallen Enchantress with the command line parameters /username "my username"/password "my password." (replacing username and password with your user name and password.)"...

Wait... problem solved as I type this post.  I accidentally hit escape on the startup screen, instead of cntl-escape to return to desktop, and the game booted up okay to the menu screen.

So, nevermind I guess.  Just thought I'd still mention it.  I appreciate the message trying to be helpful, but it isn't the most user friendly advice, since I run games by double clicking on them, rather than command lines, and came here to ask about that.  Anyhoo, off to the game.