FileZilla/FileZilla Pro usually detects the character sets supported by a remote server and modifies file names accordingly. To use a specific character set for a specific connection:
- Open the Site Manager.
- Select the connection to modify.
- Click on the Charset tab.
- Select the Use custom charset option.
- Enter a character set code. See https://en.wikipedia.org/wiki/Character_encoding#Common_character_encodings for common character sets.
- Click on OK.