How do I find which unzip program I installed?
 

I have EQ on my computer at work and also at home. When new files come out, my work computer unzips files fine. When I try at home unable to get them to work. How do I find out which unzip program I have loaded at work so I can download same one at home?

try http://www.7-zip.org/

Look at the name of the program that starts when you unzip something at work.
Download that program on your home computer.