If PaperPort still appears on your program list after you uninstall it, means that the application is not uninstalled properly. Restart your computer and if it still appears in the list try using Revo Uninstaller in order to uninstall it. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.
