I just tried it and had no problem with a TR download.
From time to time, the TR download server has problems.
I noticed last week that TR changed the downloads page which might have affected some links.
Many pop-up blockers stop TR downloads from opening the new window. Now that they do not have a secondary download link, you need to allow the pop-up.
Thursday evening is often a bad time to access TR content as that is when they tend to roll out updates and new features.
One other comment, if you are running Firefox with the PDF download extension, install the update that became available yesterday. The prior version had a number of bugs in it.
Chas