I installed this speedtest some months ago. It ran o.k. but there was/is an unresolved problem if Norton is also installed.
I had not run it for some time until a few days ago,when I had several problems with it that had not happened before. I uninstalled and then reinstalled and found that the problem you describe did not occur if I did not register it. On registering,the fault did occur!!
I have also emailed but have had no reply.
I wonder if it is still supported?