not a problem. All files are in the single subdirectory/folder. If it was installed as a service, you use the "dnetc -uninstall" command at a prompt. Next reboot it will not restart, or you can stop it anytime with "dnetc -shutdown" at a prompt.
If it starts because of a shortcut in the Startup folder, then just erase the shortcut.
This is about the least resource hungry program you'll ever use. (except for CPU usage; it loves that CPU percentage, doesn't it?)