From support:
Now let me tell you the process of Listingpro theme update
First of all go to wordpress dashboard
1- Deactivate Listingpro theme and activate any other default theme,
2- Deactivate Listingpro plugin, Listingpro ads and listingpro reviews all these 3 plugins,
3- Now delete all 3 plugins, and Listingpro theme too
Now follow these steps to install newer version of theme and plugins,
STEP 1: 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 latest theme file listingpro.zip
STEP 6: Click Install Now
STEP 7: Click Activate
PART 2: INSTALL LATEST PLUGINS
STEP 1: There will be notification after theme activation at the top, click Begin installing plugin
STEP 2: Select all plugins and install,
STEP 3: Activate New installed plugins.