Octane for Rhino not loading

Hi,

I get a message when opening Rhino5 that Octane cannot be intialized. I click OK and then get another more cryptic message 'Exception in read document at
Rhino.FileIO.BinaryArchiveReader.ReadDictionary()' and some other stuff. I have un-installed and reinstalled and updated drivers and everything I can think of. I inquired at Rhino forum and heard from Paul but this is still happening. I was using a GTX260 but now am using a GTX460.

Please help.

I didn't find the right solution from the Internet.

References:-
https://render.otoy.com/forum/viewtopic.php?f=41&t=46026
Logistics Solution Example

Thanks!