Now Click On Below links and save all 3 files via press Control + S button in your computer.
Now see attached image.
Now upload XML file construction-techup.xml here –
Choose a XML file for content import
Then upload .wie file construction-techup.wie here
Choose a WIE or JSON file for widget import
And finally upload .dat file construction-techup.dat here
Choose a DAT file for customizer import
Then click on import demo data button
Be patient and do not leave the page before the import ends. It takes some time till the importer upload all content and images.