Yes… what Anthony linked you to. Here’s what I inserted into my param file. Make sure you backup your existing param to another directory first…
[C4D_2025_RenderExecutable]
Label=C4D 2025 Executable
Category=Render Executables
CategoryOrder=0
Index=20
Type=multilinemultifilename
Default=C:\Program Files\Maxon Cinema 4D 2025\Commandline.exe
Description=The path to the Cinema 4D executable file used for rendering. Enter alternative paths on separate lines.
It worked, I didn’t expect a license problem, as we tried it with a workstation where c4d 2025 is already in use. I didn’t know that the commandline need an extra setting for its licensing.