They're the same in both branches, is the thing. The 2.50.x branch has the project files from master. The proper project files never went to git in the first place.
Edit: Hm, nope, the ones from the old repo don't have the sound library separated out. That may not really matter, though...
Well, they're less wrong, at least. I'll put them up, and I guess they can get fixed or whatever.