I use Cubase 9 artist
I have installed komplete 10 and set the correct paths in plugin manager
All the vst instuments are visible in the plugin manager window. And it all seems fine.
However, I can not see them when I open the Add new instrument browser.
Are you trying to add them as a track insert or in mediabay?
Regards 
I realized that I could add the komplete instrument by add a new instrument rack
Seems that solves it my problem 
Well it works around your problem rather than solving it…can you screengrab the add new instrument browser that you are talking about?
Hi There
Just a thought, have you had a look in the plug in manager under devices? If you had set up one of your own lists there, when adding new instruments i always need to drag them into my list before it will show up.
Best Regards
Dave