it´s been 10 days since I posted the questions and I can´t still activtivate the license and try octane out.
Would have been good since I have time to try octane out during christmas, which I may not have that much of after that.

I have posted to you the screenshots of my account with profile and ...

Why is it so much trouble installing Octane, I had an older version, didn´t like the installation and licensing process, takes to many steps and time to get going.

Now, I can´t activate it through the command prompt in the license server, it says install by the Otoy account, ok..so the only thing I ...

Hi,
Try to upgrade the Nvidia driver with a clean installation.
ciao Beppe

Think it is solved and I do not think that was the issue, I was looking in to preferences to make sure cuda should be selected..and thought that should be it in order to have octane show in the render tab, but
then I found ...

Hi there.

PrometheusA here, also know as prometheus on newtek forums, I just downloaded the Free Octane for blender release, unpacked the zipfile to my second harddrive, and opened serverprime folder, clicked on octaneServer, and logged in.
Then back to the client folder and starting the blender ...