Filezilla was acting weird with version 3.21, which is pretty old; the current one is 3.30. So, I decided to update it but it looks like this is not possible. After spending hours trying it, I returned to the old version 3.21.
Is there any possible way to update it , or is there any other FTP client that works better (and can be updated)?
Update:
I run Ubuntu 16.04 TLS, the post about repositories not having latest versions is not relevant because I need procedures to follow, not an open discussion.