Is it a production server or a dev box? If it is dev box, remove the connector and just configure one of your existing (non-working) site with CF 10 and then test the behavior.
you can check the handlers that is there any handler for OpenBD in the handler mappings or not though I am not sure that it does add the handlers or not 
Also, if you think that this Open BD is really pulling up your hair then you can take the backup of webroot (your websites)and then reconfigure IIS. This way it will remove the OpenBD as well but remove the CF 10 connector first before removing the connector.
Thanks
VJ