IWP ?session? stays active, can't go back

I've been doing a lot of testing with IWP ver 7 and from time to time for whatever reason and maybe its the user. IE gets closed and when the user goes back into the app they find there on a screen (they may have already been on)and locked and can't get off or to a previous screen.

Anytime someone gets kicked out or exits the browser, I would like the session to be released and when they attempt to go back in to the app a start script.

If they close the browser and go back in. Same thing.

We need the ability to KILL an active session or something so when a users gets stuck and exits there browser we can reforce a start script.

At the very least a URL command that says this is a new session START OVER type thing when they go back to get in the application.

Anyone else have this problem? Any solutions?