Hi,
Thanks for info, unfortunately I copy a new image of the partition since and reinstalled Unsniff and now it's OK, Unsniff is a realy nice software, really.
Before that I tried to uninstall-reinstall but didn't work.
The problem appeared when I pushing on the new button at starting, so never possible to open multiple windows nor one.
Now, I wonder if another software didn't blocked some settings (writing) in the related directory, the disk was not full.
I'll take your advices in consideration if the problem comes back and report here.
Thank you for your help.
Christian