How do you mean your teamviewer stays open? Could you describe it more? Are you still having a connection with another PC? Does it start up everytime you startup your PC? Does it run in the background when you force quit it? Does the teamviewer icon stay onn your taskbar or in the icon bar? Do you have a screenshot of some sort?
Thank you for using teamviewer.
In my case, I finished a connection to another PC, but the TeamViewer initial window (the one where you start a remote session) just won't close. I have to kill it via Task Manager.