You could open the console, tilda key, ~. And then type in
enableracemenu and hit enter. At least I think that's it, sorry its been a while. You can then reselect a face/hair etc. If you've re-added the mod you should be able to find the one you had originally.
Alternately you might be able to update the mod in your savegame using wyre mash to get around the problem... Have a read of the help on updating mods. Not 100% sure that'll do it, someone else probably has more of an idea. As I alluded to above I'm pretty rusty on messing with MW at the moment.
-kaos