Hi CB Engine
Good news. It seems to be solved.
I deleted once again the remaining cb engine folder from the wp installation on the server.
Uploaded the new version again from your site.
Installed it via the normal WP upload.
Activated.
Works fine at first view.
I had again internal server error on that site when I was on the wp admin today, but that was before I did all above.
I’m very busy right now hence it can take a while before I’ve reinstalled it on all sites, but since I don’t use many free plugins and always have the same theme (WeaverII Pro, most of the time the blank subtheme) I don’t expect more problems now.
Have a nice day.