TDM`s Clayoo is broken and I had already contacted them. I use this plugin daily so should have known better than to update so soon.
The person who I think is the lead on that plugin told me that they are working on a fix but until then advised me to go back to SR8. I quote from their support:
The fastest solution is to uninstall Rhino and install Rhino sr8. I’m working to fix Clayoo asap. If you can’t find the Rhino sr8 contact us and we provide you a Rhino sr8 installer.
We will publish a new Clayoo sr as soon as we have all the problems fixed.
I wil go back to them for a link to the SR8 to see if they can supply it as they stated. Thanks for the response.