NitroMan has been a star in the c4d community for many years and has developed dozens of free plugins as well as nearly 20 affordable commercial plugins.
He’s super at responding to questions and annual updates. That said, his torrent of plugins has slowed to a trickle as I believe he’s been busy doing more work in recent years with the Maxon mother ship.
I’ve not been able to get his commercial plugins to work in R19 and have not heard from him via e-mail - I sent a message this past weekend. I believe I need new key files. I’m sure it’s a fuss for plugin devs to handle annual updates.
One challenge with plugins is that so many have different procedures to make them work: serial numbers versus key files, different plugin folders, etc.