The guide recommends the Gufw firewall GUI. I installed it by apt

gufw/oldstable,oldstable,now 12.10.0-1 all [installed]
  graphical user interface for ufw

Typing ẁindow key + gufw, I cannot see the application. Only access is through terminal by gufw which is not enough. I am thinking why so + how to fix the issue because I am systematically using too little firewall in Linux.

Installation and testing the packages installed

1. Studying the package masi@masi:$ apt search gufw

    Sorting... Done
    Full Text Search... Done
    gufw/oldstable,oldstable,now 12.10.0-1 all [installed]
      graphical user interface for ufw
   

2. Installation by method apt install gufw

3. Output of apt show -a gufw where I am thinking about two packages (17.04 and 12.10) so something conflicting in my system - for some reason gufw in terminal starts gufw 12.10

    Package: gufw
    Source: gui-ufw
    Version: 17.04.1-1.1
    Installed-Size: 3,376 kB
    Maintainer: Python Applications Packaging Team <[email protected]>
    Depends: python3:any (>= 3.3.2-2~), ufw (>= 0.34~rc), gir1.2-gtk-3.0, policykit-1, gir1.2-webkit2-4.0, python3-gi, net-tools
    Homepage: http://gufw.org/
    Tag: admin::configuring, implemented-in::python, interface::graphical,
     interface::x11, network::firewall, role::program, scope::utility,
     security::firewall, uitoolkit::gtk, use::configuring, x11::application
    Section: admin
    Priority: optional
    Download-Size: 842 kB
    APT-Sources: http://ftp.fr.debian.org/debian/ unstable/main amd64 Packages
   
    Package: gufw
    Source: gui-ufw
    Version: 12.10.0-1
    Installed-Size: 1,328 kB
    Maintainer: Devid Antonio Filoni <[email protected]>
    Depends: python (>= 2.6.6-7~), ufw (>= 0.31.1), gir1.2-gtk-3.0, gir1.2-polkit-1.0, notify-osd | notification-daemon, policykit-1, python-dbus, python-gobject, gnome-icon-theme-symbolic
    Homepage: https://launchpad.net/gui-ufw
    Tag: admin::configuring, implemented-in::python, interface::x11,
     network::firewall, role::program, scope::utility, security::firewall,
     uitoolkit::gtk, use::configuring, x11::application
    Section: admin
    Priority: optional
    Download-Size: 261 kB
    APT-Manual-Installed: yes
    APT-Sources: http://ftp.fi.debian.org/debian/ jessie/main amd64 Packages
   

OS: Debian 8.7
Related bug: gufw: desktop entry doesn't show up in desktop environments