The first archive you downloaded would have worked properly. It's a 7 zip archive, created using zip compression, and has a .zip extension. The issue you are having is because you're trying to open it from the FOLDER pane, but it is not a compressed folder. So rather than trying to open the folder, click on the archive file itself in the FILE PANE. Do that and it will open like normal.

i.e. the operating system likes to treat .zip files as extended compressed folders, but instead it's finding a 7-zip structure, but nevertheless the archive is fully functional for its intended purpose, to deliver an extractable mod to the user, in a compressed format, that can be opened by any unzipping utility.

Hmm...I actually right-click-dragged the file to extract into another folder, the same method I've used with 1.0 and 1.1. I'll give it another shot tonight.

Just open the file within 7-zip or WinZip, select the contents, and extract to your destination folder.

Open with a registered copy of WinZip (11.1 7466), same error.

Open with 7-zip, no error. Seems to be extracting ok, too, testing to commence.

Seems like this install requires 7-zip specifically.

I struggled to open it, but managed to do it with "Winrar".

A vast improvement over the previous version, full marks for an excellent mod.

Opens just fine with WinZip Pro v14 or 16.