I found a very irritating bug in the CV-toolbox plugin.
The screenshots (zipped) describe the problem better than words, but here are the steps that I did (Mac OS 10.9 | C4D R15.057)
1 - Download some plugs/scripts with CV-toolbox
2 - Everything seems fine
3 - Open CV-toolbox and download a few more scripts/plugs
4 - CV-ArtSmart, CV-Swim and CV-Boole Tools show up as *MANUALLY INSTALLED*
These tools don’t even show up in the history tab