Hi @kiesi, just replying to confirm that what @C4DS is saying is true.
If you need to have a plugin installed elsewhere you can add an additional plugin lookup path in the Cinema 4D preference within the Plugin category. Otherwise you can also execute Cinema 4D with the next argument g_additionalModulePath={YourPath} or define g_additionalModulePath as an environment variable to add an additional python lookup path.
Cheers,
Maxime.