The author of the editor just posted an updated build directly to the BOSS VF-1 Yahoo Group which is where the installer will now be hosted. You can access the group here: http://groups.yahoo.com/group/bossvf1/
I never personally latched onto the editor. My recollection is it could not physically save the patches to the VF-1, you had to do that manually. So you're stuck using the hardware for some of the patch editing regardless.
With the editor you could only edit the parameters in real-time, which I suppose is helpful since you can see them all on a computer screen instead of the back-n-forth menu diving on the VF-1 itself. However, I find the VF-1 user interface to be pretty easy and fast to use, thus just continue to do all of my editing directly on the hardware.