I've been re-installing a number of instruments in Komplete Kontrol. I've performed the procedure for resolving missing thumbnails a few times and, consistently, the following instrument images are missing from /NI Resources/image folder:
- Massive
- Rickenbacker Bass
- The Giant
- Session Horns
.. so their thumbnail image is just a gray box
I've also tried to reinstall these specific instruments, but Komplete Kontrol is still missing those specific thumbnails.