First off I must say that I never used Dwarf Manager. I always just spent ~30 minutes micromanaging every immigrant wave to make sure I wouldn't need to mess with their labor settings ever again.
But now I must say this is a very impressive program. With this it looks like I wouldn't need to anymore.
Anyway I also had the issue with dwarves not showing up. But that has been fixed for me with the extra logging version. Even when not technically using dwarves. It seemed to respond slowly when I scrolled over to see all the hauling labors for the first time, but I imagine that was just loading, since after the first time it worked excellently. So that's not a big thing in my book, and is likely unavoidable.
As a side note, more logging is right, I don't think I ever saw a 4500 KB text file before.
Nice work dude.
P.S. Windows Vista for reference. So if it helps it works even under a notoriously unruly OS. Vista just bugs me to make sure I want to run it like everything else does.