After restarting your computer, and before starting LonMaker or any other LNS applications, please check the list of running processes. Please look for nsseng.exe, vniserver.exe, lcaserv.exe. If you see any, the LNS Server is running as a service.
To modify this setting, you can go to the Control Panel-Administrative Tools-Service. Double-click "Echelon LNS Server" and change the start-up type to Manual.
Alternatively, start the LNS Server and select Options-Uninstall as service