Microsoft .NET error on startup

Hello,

After installing the newest Rhino 5.0 version (5.6.***) everytime when I open the program I get a message notifying me about an *'Unhandled exception has occurred in a component in your application. If you click Continue, the application will ignore this error and attempt to continue.
Index (zero based) must be greater than or equal to zero’ (this is an Microsoft .NET Framework error).

After clicking continue everything seems to be fine, but I wonder what is the cause for this error to occur and what I can do to prevent this from happening!?

I installed the latest version of .NET Framework (4.5).

All the best,

Mark

This is possibly a problem with a plug-in.
Maybe this approach will help you pinpoint the problem