Related: Windows and stat() a.k.a. -X

And a note on backslash (\) vs. forward slash (/):

Windows works fine with forward slashes, use them to get rid of all escaping issues of backslashes. As a welcome side-effect, this will make your code easier to port to other systems where the path sepearator is a forward slash. The only issue with forward slashes on Windows is that some old and/or stupid programs interpret forward slashes as option indicators, even when found in filenames. In that case, a simple

tr|/|\\| for @args;
[download]

before passing @args to the problematic program should help.

Alexander