Dreamweaver CS4 problem [CS4 IS DEAD]

Thanks Jon.

Indeed my hosting services provider gave me the same suggestion. I didn't have to use Filezilla, I finaly figured out (thanks to the guidelines offered here: https://unihost.com/blog/how-to-connect-to-ftp-server/) how to manually establish a connection to my remote ftp server that now shows up as a folder (witgh all my remote files included) in my Windows file manager.

So now I was successful to edit and save http files locally and then copy and paste to the ftp server folder, thus effectively bypassing the non-responding "put" function of Dreamweaver CS4.

This also proved that the problem resides with the CS4 program not the host server.

Thanks Nancy. Indeed I have been very hesitant to uninstall and then reistall CS4 from a disk. I prefer to keep CS4 with whatever functionality it provides (ability to edit local files) because I resolved the issue as you can see in my reply to Jon Fritz's suggestion

The two issues you're having may be unrelated.

Sometimes, especially in shared hosting environments, updates to the server will change user credentials causing errors when you try to connect. 

Try running the free Filezilla FTP Client and see if you can upload from there. If you can, at least you'll be able to update your site while troubleshooting continues in DW.

If you can't upload with Filezilla, it would point to a change on the server. You would need to contact your hosting company to see what they've changed and get it corrected.

CS4 is dead.  Activation servers for it no longer exist. It's impossible to reinstall and activate CS4 from disks or downloads on any device. 

There are security & other reasons why nobody should be using 15 year old web software.  Sites built with CS4 will likely pose usability problems for people with modern browsers & mobile devices. 

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MODERN CODE EDITORS:
-- Adobe Dreamweaver CC - https://www.adobe.com/products/dreamweaver.html
-- Codespaces (free, browser-based) - https://github.com/features/codespaces
-- Nova (Mac only, formerly called Coda) - https://nova.app/
-- Pinegrow - https://pinegrow.com/
-- Sublime Text - http://www.sublimetext.com/
-- Visual Studio Code (free) - https://code.visualstudio.com/
-- Wappler ~ Visual Web App Builder - https://wappler.io/
============
ONLINE SITE BUILDERS:
-- Squarespace - https://www.squarespace.com/
-- Webflow - https://webflow.com
-- Wix - https://www.wix.com/
-- WordPress (open source) - https://wordpress.org/

Hope that helps.