Click on the DOWNLOAD IMAGES button on the main page. Or here:
In the window that opens, click on the Download symbol at upper left, as shown (red circle):
Click "Save As..." and save the file to a location of your choice.
On your computer, go to the location to which you have downloaded the file (Downloads or Documents, for example.)
Right-click on the file and choose "Extract."
The file (gtmarx-images.pptx) will be extracted to the same location in which the .zip file resides. You can then work with and extract the images in the file.
