Better off posting this to a regular thread. But...

By default close button minimizes apps.
You can close apps with factory configuration, but it's a pain.
Goto Start->Settings->Memory->Running Programs

With SPB plus you can configure it the way you like per application. I decided I like the default behavior to leave apps running and I now have a short cut way of close one or all apps from holding the close button.

Try the demo, you'll probably like it.