@oriol thank you for your comment, it perfectly worked for me. all I did was:
$ sudo apt-get install network-manager-pptp-gnome
then when opening the new VPN wizard the pptp option showed up.
@oriol thank you for your comment, it perfectly worked for me. all I did was:
$ sudo apt-get install network- manager- pptp-gnome
then when opening the new VPN wizard the pptp option showed up.