Hey! Took me some time to get a reply out to you, with making a new account and all.
I thought you should know I had this exact problem, pressing enter at the embark fluff would crash my game, came here in search of answers and saw your post, jumped for joy only to find out no one really even took the time to help you.
But, I managed to find a "fix". Not a real fix but hey, it works.
Try downloading the 1.30 version of masterwork DF, and delete your old versions of DF. If I recall correctly you will have a dwarf fortress that is a few versions younger but nothing too drastical.
I have done this myself and have been playing happily ever since... Well, "happily" since my first fortress got downed in the first year due to asp's and zombies, and my expedition leader thinking it a good idea to take a dive of the bridge at day 6... But its been loads of fun, and I can actually embark!
Hope this also works for you, if not, I hope some people with a bit more technical know-how can find an actual fix for this problem!
Edit: when I say old versions I'm referring to the current DF on your computer, which is actually probably a newer version.