ajrpai So you copied all the folders in to /home/"username"/.icons/elementary/apps/ so that inside your apps folder you see folders for 32,48,64, and 128 with the correct size icons in each folder? Are you using the default elementary-icon-theme? If not you will have to change the name of the folder to the theme you are using ex. /home/"username"/.icons/numixsquare/apps/. If it still doesn't work which version of LibreOffice are you using? I am using the latest version from their ppa. Maybe they changed the icon names from previous versions. You may have to edit the .desktop files for all the LibreOffice apps to point to the new icons or rename the icons themselves to match what the .desktop file is pointing to.