A "Trial Stop" or "Trial Reset" mechanism does not crack the software; it essentially sanitizes the system of the footprint left by the previous installation. By removing the evidence that Radmin was previously installed, the installer treats the run as a fresh installation, granting a new 30-day trial.
According to the Radmin 3.5 Server End User License Agreement, users are granted a single evaluation period of from the date of initial installation. During this time, the software is fully functional, allowing administrators to explore its high-speed DirectScreenTransfer™ technology and secure file transfer capabilities. Trial Duration: 30 days.
If the trial period appears to have ended prematurely or the icon turns yellow (indicating the agent has stopped): How do I keep using a program past its free trial period?