"The ZIP files are not working." Yes they do!
"And none will open/un-zip to a format that can be opened." Yes they will!
I never thought I would have to explain something as basic as unzipping split-Zips ...
...but there you go (with video-tutorials for Windows and MacOS):
Windows 10 using "WinRAR"
With all 4 zips in the same path, right-click either the first (MADI.z01) or the last (MADI.zip)
and choose "extract to..." to unzip (WinRAR) the split-Zips. Done
MacOS Mojave using "The UnArchiver"
With all 4 zips in the same path, right-click either the first (MADI.z01) or the last (MADI.zip)
and "open with..." (The UnArchiver) to unzip the split-Zips. Done