This is a powershell script I have created that performs the following;

• Download the attached .zip file and extract it and open/run the file file.
• Checks for 7-Zip is installed. if not, click Ok to install.
• If 7-Zip detected, update tool will proceed.
• Update Tool will detect your World of Warcraft installed location. If unable to find, a popup window for you to select your WoW folder.
  
• Once WoW folder is set, API connection to TukUi site and variables set to download and extract to your WoW interface\addons folders for both retail and classic.
• As per TukUI instructions, old Elvui is removed, extracted/installed.
• You can now open WoW or in already in game, /reload in chat.
• Install complete.