Source (link to git-repo or to original if based on someone elses unmodified work): https://github.com/kiraitachi/Official-ESET-NOD32-Antivirus-4-Scan-Menu
--Requirements are the following:
1. ESET NOD32 ANTIVIRUS FOR LINUX DESKTOP 4
2. KDE 5
1. Clone repo to your folder git clone https://github.com/kiraitachi/Official-ESET-NOD32-Antivirus-4-Scan-Menu.git
2. Move to Context Menu Files folder
3. Copy .desktop files depending on your KDE 5 platform to /home/YOURUSER/.local/share/kservices5/ServiceMenus/
I suggest only moving eset_nod32_antivirus_options_no_scan_kde since others will only scan but not clean. Choose whatever you need.