Installing a project into MPLAB® Xpress requires a few simple steps:
In MPLAB® Xpress select Import Project from the File menu.
The Import Project screen will appear. Click on the Next button to get to the screen shown here to load the project file.
Click on the Browse button to open the search for the project .zip file you download, locate it and click Open.
This will load the project into MPLAB® Xpress.