1) Do you know if it’s both plugins & scripts that are showing as manually installed?
Its happening with Pickwalk, CV swim, tradigitools, planesmart and CV artsmart
2) Have you setup some sort of “sym-linked” directory structure so that your scripts/plugins folders are shared between multiple versions or installations of Cinema 4D?
No I only have R17 installed once
3) Have you moved your C4D installation in any way? Did you copy your Plugins folder from an older version to a newer one?
No haven’t done either of these things. But I did move Artsmart to my new plugins folder once I upgraded as I had installed it manually before in an older version but have since deleted it.