You will need to extract it using a zip program such as 7zip a free program you can download from here: https://www.7-zip.org/
READ FIRST *NOTE:
Depending on the set-up of your PC/Laptop Antivirus and Windows defender, you may get a message about windows protecting your PC against Unknown Publisher, so you might have to Right click on the downloaded program (or if option shown click Next, anyway) go to Trouble Shoot compatability, - select Try Recommended settings, -Test Program, click Next and should work, You may get a notice about - Unknown Publisher, working on computer, select YES.
Each computer is a little different in its set-up so messages can vary.
Because it is an old program Windows can be over cautious, but a lot of my students when I was teaching in the past used this little program