Empty help pane in win10

Paulv6

Bit poster
When I open the help in a program, left pane are the topics, but right pane no info.
On a win10 pc there is no problem. Everything is the same (admin rights, same dir in c:\).
Worth to mention is that when I copy the .chm files to the desktop, they function normal. But from within the program (context sensitive) no luck.
Another strange thing is that after pressing 'help' win10 asks if I really want to open that program (I guess win program hh.exe).
Someone plz?
Grz.
Paul
 
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