Listingpro Bulk Import Addon is included in the full package downloaded from ThemeForest.
STEP 1: Login to ThemeForest.
STEP 2: Go to Downloads
STEP 3: Click green Download button.
STEP 4: Select All files & documentation
STEP 5: Unzip the zip file.
STEP 6: Go to Bulk Importer Add-on > listingpro-Bulk-import-addon-1.x.zip