ubuntu 13.04 no desktop dash, no unity window bloched

[robyt68]

Distribution: Ubuntu 13.04 raring
Application: Ubuntu Tweak 0.8.4-1~raring1
Desktop:ubuntu

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 498, in _load_module
    page = module()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/admins/sourcecenter.py", line 946, in __init__
    self.sourceview.update_source_model()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/admins/sourcecenter.py", line 634, in update_source_model
    self._status.load_objects_from_parser(SOURCE_PARSER)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/admins/sourcecenter.py", line 255, in load_objects_from_parser
    self.save()
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/admins/appcenter.py", line 108, in save
    file = open(self._path, 'w')
IOError: [Errno 13] Permesso negato: '/home/roberto/.config/ubuntu-tweak/sourcestatus.json'

[Ding Zhou (tualatrix)]

Could you try to open your terminal, then run this command?
    sudo rm -r /home/roberto/.config/ubuntu-tweak

I will try to add permission check while creating config folder.