The file is about 1 GB in size, but will decompress to about 40 GB. Or so I've heard. Contains full commit history. Uses SVN (AKA Subversion) source control. You'll need an SVN tool of some kind. On Windows 7 and above, use TortoiseSVN v1.10.5. You'll also need the VSCode Japanese language pack for comments and comment translate (assuming you're just an English speaker).
The needed Windows 7 TortoiseSVN install executable is included.
The needed Windows 7 TortoiseSVN install executable is included.