The Dude 3.6 is a legacy version of MikroTik’s network monitoring software. While modern versions of "The Dude" typically require a RouterOS server, version 3.6 is notable for being a self-contained application that can run directly on a Windows PC as both a server and a client. Download Link
Use the latest version from MikroTik's official site. If you need compatibility with older Dude agents/servers, consider setting up a legacy environment rather than using outdated software directly on your main Windows installation. download the dude 3.6 for windows