I hear ya Anupam, but not just this site, I worry about those files every time.
Basically they are either run files, or a small app or software that does smaller tasks.
An example is Site Builder software, which is really just a little software app you imput name and other particulars about the website you want to build, and it creates a basic website for you, with books, videos, articles, whatever the theme is supposed to be.
I think generally these are safe, but of course you need to trust the developers of said products.
AND of course, having a great virus and malware program that will scan these things as you download, and then again when it installs, is the best security.
Don’t rely on whether others have virus scanned for you, because even a clean file can become corrupt in transport or download.
Plan Your Life In Color!