I don’t know how you feel about running .reg scripts but I have a .reg file that you can run that will fix this issue.
    The contents of the .reg script to prove there’s no malice intent.
    Windows Registry Editor Version 5.00

    [HKEY_LOCAL_MACHINESOFTWAREWOW6432NodeBlizzard EntertainmentWorld of Warcraft]
    "InstallPath"="D:\Program Files (x86)\World of Warcraft\_retail_\"

    I advise to Create a restore point first.

    Ensure that World of Warcraft & Dugi Guides Installer & Battle.net is not running, then run the .reg script, click Ok then Ok again.

    Reboot the computer or laptop and then try clicking auto detect button within Dugi Gudies Installer again, followed with Reinstall.
    You may need to right click the .reg file and then click Properties, then tick the box Unblock.