1 ) Please activate khore child theme .Please follow the following link to activate child theme.
https://showthemes.zendesk.com/docs/khore/how-to-activate-a-child-theme/
2 ) Please navigate through Appearance ->Editor,add following style in style.css and save.
.site_opened .menu__item div span {
display: block;
font-size: 13px;
padding-left: 34px;
}
.menu__item a.page-lnk {white-space: normal;}
.site_opened .site__header { width: 240px;}
.site_opened .site__content { left: 240px;}
3) Save the file.