I don't know this expander software that you mention. The Finder can expand a zipfile without anything more. Just double-click on the zipfile.

Cheers.

Paolo

https://www.preta3d.com
FB: https://www.facebook.com/RealityPlugIn
Tw: @preta3d
G+: https://plus.google.com/106625816153304163119
The Reality Gallery: https://reality-plug-in.deviantart.com