Thanks @Shahjada! I’m sorry to be a pain and asking more questions as I’m pretty new to these things.
I think the link I attached above is not really private as it is published on the website and can be searched via Google to access that page and anyone can download the file from it, which I feel like it is similar to a public link. Please correct me if I misunderstood this.
How big is the risk if the bots can easily crawl these links? As on the website, we have many other direct download pages like this one on the website and all use WP Download Manager Plugin. So if I select “Unmask Download Link” which means all other direct download pages will be exposed to risk as well. Am I right?
Is there any other way I can fix the problem? E.g. Reinstall/reset the Plugin, Editing the code etc.?
Thank you again.