Creating a link to an .exe file

I have recently been asked to convert a simple html site to wordpress and cannot create a simple link to a downloadable .exe file stored on the same server. The site is
https://visionitsystems.ltd.uk and the .exe file resides at: https://visionitsystems.ltd.uk/exe_files/visionit.exe

WordPress is being very clever and suggesting the page/post does not exist and directs me to the default 404 page of the theme. How do I get around this please, or am I just being stupid!@

Many thanks in advance