I can't recommend this to my users while it ships GTK 2.12.11 :( Is there anything I can do to help out there?
Well. GTK+ used to be available as an all-in-one package for Windows with a readme file saying
"This is a bundle containing the GTK+ stack and its dependencies for Windows. As such it is nothing more than a combination of the individual packages it consists of. For a list, see share/doc/gtk+-bundle-2.12.11-20080707/components.lst. Both run-time and developer packages are included."
I _think_ that is discontinued. If you can figure out a place to get a working build environment for compiling with Visual Studio that would help a bit. If you can find a place to get something that works with VC9 it would help even more.