'Please note though that this won't be an officially supported version and is not compatible with the recent Steam release, so you're playing at your own discretion,' a rep said.
Capcom has re-enabled the original GFWL version of the game as a beta branch, and provided step-by-step instructions for accessing it to Eurogamer:
But for those willing to put the effort into it, and run the risk of potential headaches, it is once again possible to play in split-screen.