STEP-1: Go to Appearance -> Import Demo Data, and click to Switch to Manual Import button.
STEP-2: Select Content.xml, widgets.wie, customize.dat, and theme_option_data.json file from your local directory. You’ll find the files inside the Vaincode theme bundle.
Write theme_option_data in the input field of the Redux box.
STEP-3: Now click on the Continue & Import button.
Here is the video tutorial: