Description of problem:
This crash happened when closing yumex preferences.

Version-Release number of selected component:
yumex-dnf-4.1.5-1.fc23

Additional info:
reporter:       libreport-2.6.3
cmdline:        /usr/bin/python3 /usr/bin/yumex-dnf
executable:     /usr/bin/yumex-dnf
kernel:         4.2.6-300.fc23.x86_64
runlevel:       N 5
type:           Python3

Truncated backtrace:
dialogs.py:185:handle_setting:FileNotFoundError: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/home/username1/.config/autostart/yumex-dnf.desktop'

Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/yumex/__init__.py", line 981, in on_pref
    need_reset = self.preferences.run()
  File "/usr/lib/python3.4/site-packages/yumex/gui/dialogs.py", line 74, in run
    need_reset = self.set_settings()
  File "/usr/lib/python3.4/site-packages/yumex/gui/dialogs.py", line 139, in set_settings
    self.handle_setting(option, state)
  File "/usr/lib/python3.4/site-packages/yumex/gui/dialogs.py", line 185, in handle_setting
    "/.config/autostart/yumex-dnf.desktop")
FileNotFoundError: [Errno 2] Datei oder Verzeichnis nicht gefunden: '/home/username1/.config/autostart/yumex-dnf.desktop'

Local variables in innermost frame:
self: <yumex.gui.dialogs.Preferences object at 0x7fe311fa5e80>
state: False
option: 'autostart'