Masterwork is pretty heavily dependent on DFHack, to the point that i think it's fair to say MDF doesn't really support XP either.
My understanding is that the problem originates in a quirk or bug in the compiler software, and so isn't something the DFHack team can really address.
(edit) Eh, never mind my comment -- the switch to the new compiler, VS2015, happened after DF44, so i don't think that incompatibility would be relevant for Masterwork. Also i'm not sure exactly what you mean by the Start menu, if you mean the Masterwork launcher interface that appears before DF opens at all, then that doesn't involve DFHack. So, basically i have no idea.