There is a plugin for Cinema R23:
Vertex Normal Tool
You could find it here https://frostsoft.blogspot.com/p/fssoftware.html.
And it doesn't work correctly with any version of Cinema newer than R23.
Unfortunately, an author doesn't respond to my emails. It seems like he doesn't support his products anymore.
Is it possible to make this plugin run with modern versions of Cinema?
It seems like it should work. I found this here https://developers.maxon.net/?p=3815
Plug-ins that were built for R23 should work with S24. They require to be rebuild against the R24 API in only a few cases. See C++ documentation for more informations.
Maybe there is any way to rebuild this plugin?
I forgot to say, the plugin is encrypted (.pypv), so I cannot edit it.
P.S. Is there any alternative of this plugin?