You need the specific .cdl64 file and the octane.dat license file. If you have an old account with OTOY, you can still access version 3.07 R2 in the "Legacy Downloads" section.
Copy your octane.dat license file into: C:\Users\[YourName]\AppData\Roaming\OctaneRender\ Octane Render 3.07 R2 Plugin for Cinema 4D
So, what makes the Octane Render 3.07 R2 plugin for Cinema 4D so special? Here are some of its key features: You need the specific