ZipExplorer is a P3dO plugin.

ZipExplorer automaticaly lists archives files content and display them in P3dO thumbnail view and Information tree.

This function does not actually unzip any data, its purpose is solely to display a ZIP content.
Instead of displaying a ZIP icon, ZipExplorer displays each ZIP archive with first picture encountered in the file if any.
ZipExplorer show the first image taking into account the alphabetic and ZIP folder hierarchical order, i.e pictures at the root of the ZIP files are first.

ZipExplorer showing a thumbnail image:

Each time you double-click on an archive file, ZipExplorer will expand its content in P3dO. If you double-click on the ZIP file again the archive is unexpanded.
When a ZIP archive file is clicked ZipExplorer display a thumbnail view of the ZIP archive content with a small ZIP icon for each file. As shown:

The content can show icons, pictures -as above- or 3D files depending on the ability to decode the files formats.
Currently all 3D file formats and pictures are ZIP through viewable with the pro version. The freeware version is limited to 3D Wavefront OBJ and 2D RSR, PNG pictures.

Unzipping to the disk

ZipExplorer unzipping capabilities are published by another plugin called ZipInstaller. ZipInstaller is only available with P3dO pro.

ZipExplorer doesn't add any menu item in your P3dO application.
Instead ZipExplorer plugs into the "Open" command. Thus "Open" on a ZIP will expand that ZIP into P3dO thumbnail view (without unzipping), see above for details.
Note that if you want to open an archive file with your archive utility use the "Open with..." menu command or use the ZipInstaller plugin (with P3dO pro).