If it is missing from the VS binaries then that is a mistake. I'll fix that soon.
There is a bug in SFML 2.1 that is really annoying, and is causing the problems for the form builder.
You should be able to click on the title bar of the big window and move it away. Then when the windows are no longer overlapping you should be able to move the other windows after clicking on the title bar.
It should become usable when the windows are no longer overlapping.
Or is it even worse than that and can't you really move anything?
Edit:
I just downloaded the pre-compiled VS2012 libraries and it contains a form-builder directory with a FormBuilder.exe.
Did you download the v0.6-alpha1 from the
download page?