I'm trying to open SGF files with the KGS interface ("CGoban3").
For example I would like to open these commented games found on the Go Teaching Ladder (GTL): http://gtl.xmp.net/reviews/of_smallboards
So I click on the number of the file in order to open the game, then this small window opens:

I've tried to select "Java(TM) Web Start Launcher" which I found here: C:\Program Files (x86)\Java\jre1.8.0_31\bin\javaws.exe (I think this the KGS interface, but I could be wrong)
But then I get this error message:

And when I click on "Details" I get this:

So...how do I open these games with the KGS interface?
Thanks in advance for your answers.