When using FileZilla’s built in update checker, if you have selected FTP Client as the preset you are unable to use the update checker. Could an exception be added to the FTP Client preset since a majority of FTP clients check for updates in some way?
If you want to be able to do your updates from Filezilla, edit the preset ftp client policy passive ftp rule (FTP-PASV) to allow the destination port to be any.