I just downloaded the rhinogold 4.0 trial version with rhino from the website and when I try to open rhinogold I get an error “unable to load plugin”. I click on details and it says that the plugin was designed to run on the latest rhino 5 service release. I try to download the service release but it asks for a license code and I don’t have one as it is a trial version. PLEASE help me to fix this. I just bought an expensive computer specifically for this purpose.