We suggest you use
Filezilla. It's free and it's open source. Read its
installation procedure as well as
usage instructions. Set the server name to ftp.SecuredHosting
Only.com
We have been told that
CuteFTP works with our services, but you'll have to plunge your hand into your wallet.
Note: no quick connect feature will ever work, on any ftp software, for the simple fact that you need to activate the "FTPES - FTP over explicit TLS/SSL" to connect. This option is not available in quick connect. You need to set it into Filezilla's site manager when adding your domain. This option's name may vary depending on the ftp client.
P.S.: If your account allows ssh login, skip installing an ftp client altogether and see the ssh section below. We suggest you use one software that does ssh AND sftp all at once. Faster, more practical and even more secured!