Hi, I’d like to provide additional context on the feature you’ve inquired about.
The feature you are asking for requires PHP streaming. Which has it’s own set of challenges. Whether it will work or not highly depends on things such as the server environment, PHP configuration, the file size of the downloadable item. We offer the following paid addon which can handle that feature. The paid addon option helps to offer support for this when the users do face an issue with the PHP download option (due to the above mentioned variables):
https://simple-download-monitor.com/hidden-downloads-for-simple-download-monitor/
As far as I know, we don’t advertise this feature for the free plugin. If any part of the free plugin’s description gives an incorrect impression, please let me know and I will update it.
The original intention of the plugin (based on my own personal requirement) was to keep it super simple that can track/count and log downloads of free downloads. Keeping it simple helps to keep it lightweight and minimize chance of conflicts. We try to avoid features to the this plugin that has a high likelihood of conflicts (either with the server setup or with another plugin or theme).
We aim to add a file protection feature to our main plugin. Operating as a small team with limited revenue and overseeing several plugins, our resources are constrained. This means we develop new features gradually over time.