I just redownloaded the attachment, it has a tgz file in it as it should:
Code:
$ 7z l KoboRoot-MagicMemory-3.16.10.zip
Listing archive: KoboRoot-MagicMemory-3.16.10.zip
--
Path = KoboRoot-MagicMemory-3.16.10.zip
Type = zip
Physical Size = 2240
Date Time Attr Size Compressed Name
------------------- ----- ------------ ------------ ------------------------
2015-07-31 18:27:22 ..... 2026 2026 KoboRoot-MagicMemory-3.16.10.tgz
------------------- ----- ------------ ------------ ------------------------
2015-07-31 18:27:22 2026 2026 1 files
If you get magic_init after unzipping, then your unzipping program is a bit overzealous and extracts the tgz inside the zip as well. You'll have to check if your program has an option to turn that off, or use a different unzipper.