VNC Connections in Default mode do not close.

I have my computers setup with UltraVNC and that works fine, but I was getting some UltraVNC popups that were irritating and David recommended using VNC Default setting instead. Well that solved the popup error windows on bad connections, but now I can't close the tabs with the VNC connections. And cant close down RDM program without task manager shutdown. I am running latest version of RDM.