sudo dpkg -i airvpn_linux_x86_debian.deb

(Reading database ... 79255 files and directories currently installed.)
Preparing to replace airvpn 2.10 (using airvpn_linux_x86_debian.deb) ...
Unpacking replacement airvpn ...
dpkg: dependency problems prevent configuration of airvpn:
 airvpn depends on libmono-system-runtime2.0-cil; however:
  Package libmono-system-runtime2.0-cil is not installed.
 airvpn depends on libmono-winforms2.0-cil; however:
  Package libmono-winforms2.0-cil is not installed.
 airvpn depends on stunnel4; however:
  Package stunnel4 is not installed.

dpkg: error processing airvpn (--install):
 dependency problems - leaving unconfigured
Processing triggers for man-db ...
Processing triggers for desktop-file-utils ...
Errors were encountered while processing:
 airvpn

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sudo apt-get install -f

Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  libmozjs20d xulrunner-20.0
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  airvpn
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 8,389 kB disk space will be freed.
Do you want to continue [Y/n]?

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sudo apt-get install xfce4* xfce4-goodies

Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'libxfcegui4-4' for regex 'xfce4*'
Note, selecting 'libxfce4util-bin' for regex 'xfce4*'
Note, selecting 'xfce4-notifyd' for regex 'xfce4*'
Note, selecting 'xfce4-volumed' for regex 'xfce4*'
Note, selecting 'xfce4-panel' for regex 'xfce4*'
Note, selecting 'xfce4' for regex 'xfce4*'
Note, selecting 'libxfce4util4' for regex 'xfce4*'
Note, selecting 'xfce-keyboard-shortcuts' for regex 'xfce4*'
Note, selecting 'xfce4-cddrive-plugin' for regex 'xfce4*'
Note, selecting 'xfce4-volstatus-icon' for regex 'xfce4*'
Note, selecting 'libxfce4util-common' for regex 'xfce4*'
Note, selecting 'xfce4-screenshooter-plugin' for regex 'xfce4*'
Note, selecting 'libxfce4ui-1-0' for regex 'xfce4*'
Note, selecting 'xfce4-power-manager' for regex 'xfce4*'
Note, selecting 'xfce4-power-manager-data' for regex 'xfce4*'
Note, selecting 'xfce4-power-manager-plugins' for regex 'xfce4*'
Note, selecting 'xfce4-mixer-alsa' for regex 'xfce4*'
Note, selecting 'xfce4-screenshooter' for regex 'xfce4*'
Note, selecting 'xfce4-mixer' for regex 'xfce4*'
Note, selecting 'xfce4-mixer-oss' for regex 'xfce4*'
E: Unable to locate package xfce4-goodies