Hi rovino,
I just clicked on the HDR 2 installation and it installed it just fine. I’m not able to re-create your problem.
I did a second run with a fresh installment, and it worked out nicely again.
Since you had the option to press the install button, the records of your system indicate that you hadn’t installed it before. I got only an error message only when I tried to installed from the History list.
You can check the log file in the CV-Tool (installation) window : File> Verify Installation Log.
In the Help Menu of the same window, the CV-Tool window: Help> Report a Bug/Idea. Please use this option for the fastest help.
If this isn’t working at all, please use the CV-Tool Support Forum. Thanks.
All the best