Hi, getting the same problem here, cannot connect to FTP using filezilla (on Win10 or Ubuntu), tried most of the steps you have with no success.
Just tried again with Ubuntu and can connect, although Win10 is still failing to connect using identical credendials. Ubuntu is using an older version of Filezilla, which may be the difference??
Tried older version of Filezilla (23.0.0) on Win 10, managed to connect but authentication error. updated to latest version (23.0.2) no connection!