PillarSoft

http://www.pillarsoft.net/help/os2/warp-zip/add.shtml

WarpZip online help - Add

Brings up a dialog that allows selecting files to add to the currently opened archive. Files may be added by make a directory selection from directory container.

The files in that directory are listed immediately and allow you to:

You can also drop files from the WPS onto the window and WarpZip will automatically highlight them and click the "Selected" button for you.

Once your selections are made you'll click the "Build" button to add the new files to the archive. WarpZip will reload the updated archive at that time.

Folders  WarpZip Extract