> Since yesterday, I have a real strange problem.
>
> All filing trays are no more visible.
>
> Instead I have all folders (~1000) in the tree.
>
> May there is there a hidden settings I have changed?
>
> Thanx for hints or solution :-)
You have lost you hierarch.pm file. Exit Pegasus Mail, restore it from backup to replace the hierarch.pm in your home mail directory. When you run Pegasus Mail you will find most of the folder/tray structure is restored.
> Since yesterday, I have a real strange problem.
>
> All filing trays are no more visible.
>
> Instead I have all folders (~1000) in the tree.
>
> May there is there a hidden settings I have changed?
>
> Thanx for hints or solution :-)
You have lost you hierarch.pm file. Exit Pegasus Mail,  restore it from backup to replace the hierarch.pm in your home mail directory.  When you run Pegasus Mail you will find most of the folder/tray structure is restored.