When I try to download Automation Engine client (or other tools like PitStop Profile Editor etc.) from the Automation Engine web page, the HTTP status 404 error appears:
When looking at the URL, the server is trying to download Pilot, PitStop Profile Editor, etc. from a previous version (in the above example, the browser is trying to download an Automaton Engine Client 14.0, server was running 14.1).
This is caused by the cache of your web browser.
This is caused by the internet browser cached contents. Just clearing the browser cache should help to resolve this issue.