It could only erase a program from a disk if the disk is a re-writeable cdrw, dvdrw or dvdram.
Rhino is a very expensive program, and doesn't come on re-writable disks. Nor can I find it bundled as a retail purchase along with Vray. Vray can be purchased separately as a plug-in.
We have to be careful of illegally obtained software discussions on these forums, so unless you can show me how these programs came to be in your possession on a re-writeable disk, I'm afraid I will have to close the thread.