If you have no license, you have three legal paths:
By default, a licensed ESET NOD32 connects to ESET’s official servers (e.g., http://u7.eset.com/download/update ). However, users often search for “free update server lists” to: eset nod32 update server list free
Keep your antivirus definitions up to date without license issues. If you have no license, you have three