For FileZilla, you would:
- Select "View" then "Directory listing filters" on the top menu bar (or press "CTRL+I").
- Ensure that the "Configuration files" check box is not checked on either local or remote filters.
- Select "Apply" then "Okay" to save the changes.
- Select "Options" then "Preferences" on the top menu bar (or press CTRL+ALT+P).
- Select "Panels" on the left menu.
- Check the "Show hidden files" check box.