The other methods of "activating" a zip file are:
The file open dialog box initially lists the *.zip files in the directory defined in the Settings notebook, Paths page, which describes the default location for zip files.
Only files which have a .zip extension are listed. If you want to display a list of self-extracting (zip format) archives, change the "filter" in the Open filename entry field to "*.exe" and press the Enter key or click on the OK button.
After selecting a zip archive, the file open dialog box will close, the title of the main window will be changed to reflect the name of the zip file, and the list of files contained in the zip archive will be displayed in the Zip File Contents window.
ZipControl "remembers" the last path (drive and directory) where you opened a zip file and will use this for the next Open (during that ZipControl session).