Would be nice to see the text of those offers, like the way the rpi foundation released the text of the offer they got (I've started to investigate the PUP ecosystem, and now said ecosystem includes the shittiest Indian winlockers and fakealert trojans, designed to get less knowledgeable user to call fake tech support)
client-side, you can use WinSCP, free, supports SCP, SFTP and FTP protocols. You can also use any piece of software on your computer to edit remote files, you juste have to configure file extensions in the parameters (like MSWord for .doc/.docx, notepad++ for .txt/.log/whatever, etc)
I use WinSCP when I can and quite like it. The big problems is that for some reason it is so much slower at downloading and especially uploading files that it really isn't usable in many cases.
Filezilla and alikes succumbed to that long time ago while VLC stand above the crowd.
Kudos, hats off and happy birthday!