Ah, they are different, if you have 3DObject, it is available there.
If you let me know which example(s) has it, I'll check and swap it out for the 1-5-1 version.
PhysicsAndRotatespring and Raycast_Triggers can't open saying that it's not a valid c3c file
Added SSAO-1-6-0.c3addon, please try that (and latest physics addon and c3 beta) - for Raycast Triggers