This is the flagship version. It allows for an unlimited number of hosts and provides the ability to run the software as a background service, ensuring monitoring continues even if no user is logged into the machine. How to Obtain a Valid License Code
Searching for an "Emco Ping Monitor License Code" on the internet is a risky endeavor. You will likely find forums, YouTube videos, and blogs offering free keys, but almost all are either fake, malicious, or short-lived.