INSTALING CHILD-THEME FROM WORDPRESS DASHBOARD
STEP 1: From the left-side menu, go to Appearance > Themes
STEP 2: From the top, click Add New
STEP 3: Click the Upload Theme
STEP 4: Click Choose File
STEP 5: Browse and locate the theme file listingpro-child.zip, and click Install Now
STEP 6: Click Activate