As the webmaster has disapperared I had to create a new account for this website. I bought the plugin again.
Went to r Plugins> Add new> tab Commercial page? Click the button Check for updates.
But unfortunately this did not change anything and I am still requested to purchase the extension....(See picture).
Thanks to tell me what I should do.
Cheers. L Nicolas
At bottom of the page you will find section "Toolset - Plugins for WordPress development" where you should try to register your site key. And if you want to install the view's plugin you can download it from your account's page and install it.
Many thanks. I have now found it and added the code. However I searched for the toolset View plugin on my account but I do not see it listed. Has it a different name ?