After the latest update of Archicad 25 to version 5005 INT FULL. On Apple iMac 24 ”M1. the C4D add ons settings for export no longer appear.
I tried to reinstall both Archicad and add ons but the settings window for exporting to c4d no longer appears, while saving to 4D cinema from the 3D window appears.
Double check the state of the Cinema4D add-on through Options > Add-On Manager. You can remove and reinstall it if there is an exclamation mark on it: Cinema 4D Exchange Add-On Downloads for Archicad 25 – Graphisoft. If no, you can report it as a bug. Here's in which state you should see the add-on: