I looked at your software and was immediately reminde of a free open source product called Syncthing that looks very similar to yours but actively developed in 2020. Here is a current video demo showing what the product is and how to configure it. This may not be what you need/want and if so I apologize. Have a great rest of your weekend.
EDIT - I read up on what this software does. Syncthing does not automate the ticketing portion that Download Ticket Service does.
royceb and transocean thank you for your support, much appreciated
the thing is that the " Download Ticket Service " is really great to use for multiple huge files and multiple emails.
you just upload and tell it to send to as many people the email download link and it will delete the file(s) after a while and or password protect the download link.
I don’t use the old server manager anymore. My picture is from cockpit.
I’d recomend to use cockpit as server-manager now.
In cockpit go to => applications => webserver settings (blue button on the right) => virtual hosts “create a virtual host” => advanced settings => version of php => select php 7.3 and then install and you’ll get this: