It looks I'm not the only one who suffer from this.Hope ESET fix this as soon as they can
Searched through the forum and found many others got the same problem see below topics.
https://forum.eset.com/topic/3722-eset-ss8-freeze/?hl=%2Bgui+%2Bfreeze
https://forum.eset.com/topic/2609-scan-menu-missing-in-eset-smart-security/
https://forum.eset.com/topic/3174-ess-gui-eguiexe-freezes-at-tab-scan-computer/