Hi Mélanie,
this setting is always defined on a dialog level, it is not possible to set it on file cabinet level.
For folders, there is no way to disable it.
The setting is stored in the dwsystem database, however, disabling it manually in the database seems to have no effect.
I just tested this on DW 7.9.
Greetings from Germany,
Simon H. Hellmann
DocuWare System Consultant