Why .dcf extension are not show in DO13?

Help & Support
1

It's all in the title.
"Test.dcf" is show as "Test".
Any ideas to restore the extension ?
(windows explorer doesn't show extension either, but it was working with DO12)

thx

2

Turn off:

Preferences / File Display Columns / Filenames / Hide other extensions as specified in the Windows registry

3

thx.
in french it's the option : "Cacher les extensions de fichiers comme spécifiés dans le registre windows"