The download link leads to a "404 not found" ...

to be more specific, my java is ver 7 update 45 (build 1.7.0_45-b18)
here's a couple pics of the 'missing interface"...

So this looks like a neat program... but I am totally frustrated after using the online feature and getting halfway through a design... TWICE to have it lock up and I lose everything [:(] . Then when I try to install on my mac, with up-to-date java it doesn't work at all. When I start the program, I ...