It appears there are problems with the resources, tools, addons and reference pages. They have been unavailable for at least 2 weeks and you're not the only one who cannot access them (see here
). I'm not sure who runs the site, but I had hoped they would see the last comment in this forum and respond. I guess they don't check back here very often. I'm hoping it is a simple fix, it's just that the owner is not aware if this problem ... yet.