Simviation Forums

I can't download any aircraft from this website, and I was wondering how I would go about it.

Is your popup blocker preventing this?  You should just be able to click on the plane you want and then a window will popup saying download this file, click that button and all should be good. other than the popup blocker, I'm not sure, but there are those more knowledgeable here who will know for certain.
P.S.: Get the premium membership! It's WAY faster!

You might find this helps. http://www.simviation.com/accessprob.htm